Moparts
anyone run a Purestock/NHRA Blue print 383-B-body?
Posted By: cdp
anyone run a Purestock/NHRA Blue print 383-B-body? - 01/01/09 11:31 PM
I'm thinking of building my 383 HP to a Blueprint/Purestock spec. It will go in either a 70-Bee or RR 4spd.
I'm curious about how to get the 9.5 cr. with the limited pistons and CC's.
I think I have the 2315 pistons and the depth is at .105 in the whole. I can't see a 79.5cc head helping much (apx. 8.3).
How do I accomplish this? Do I deck the block .070-.080 to make it work?
Posted By: Florida_70Bee
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/01/09 11:49 PM
Quote:
I'm thinking of building my 383 HP to a Blueprint/Purestock spec. It will go in either a 70-Bee or RR 4spd.
I'm curious about how to get the 9.5 cr. with the limited pistons and CC's.
I think I have the 2315 pistons and the depth is at .105 in the whole. I can't see a 79.5cc head helping much (apx. 8.3).
How do I accomplish this? Do I deck the block .070-.080 to make it work?
CDP,
I have done this same combo in my 70 Bee
To get the C.R. up you will need to deck the block and mill the heads and I think Speed Pro offers a correct flatop piston
Here are some specs on my combo
The block is the original std bore 383
I am using the original cast flatop pistons standard bore.
Speed pro plasma moly rings
The block has been decked to a piston to deck clearance of -.006. (NHRA stock elim minimum specs are -.004 (for a 70 383 335hp) in untouched form I measured the piston to deck at -.050
I am using a Fel Pro steel shim gasket for a 413 which has a compressed thickness of .020
The heads are stock unported 906's with stock size 2.08/1.74 valves with a good valve job. Additionally the heads have been milled to 80cc's (the NHRA minimum is 79.5cc's and in untouched form they were 88cc's)
All this adds up to a measured compression ratio of 10.12:1. This number would be higher with a .030 or .060 piston. Originally in untouched form I measured the CR at 8.44:1 (a far cry from it's 9.5:1 advertised CR.
The cam is a Mopar Performance stock resto cam for a 440 6 pack (same dimensions as the original 383 magnum cam except it uses a 3 bolt cam gear instead of the original 1 bolt)
The intake is the unported original.
The carb is the original 585 cfm holley
The converter is a dynamic 11 inch that stalls at 2300 (like the original converter
The ignition is a combination of Mopar Performance elctronic and FBO Ignition Box, and Coil
The exhaust is a TTI 2 1/2 H pipe with Dynomax Ultra Flow Mufflers
I am running a 4.10's in the rear and I am using a pinion snubber and I clamp the front segment of the original springs.
The car weighs between 3975 and 4015 lbs with me in it depending on the fuel load. I leave the line at around 2000 rpms and roll into the throttle (I don't stab it at green as I am running F70-14 Polyglas's) and shift between 5600 & 5700 and it goes through the traps at 5600 rpms.
I hope this helps
Posted By: 383man
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 12:11 AM
I was going to say to get in touch with Andy as his 70 Bee 383 Pure Stocker runs great.
But he (Andy) beat me to it.
Ron
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 12:11 AM
Wow...what an answer! I think you own the Red-B, right? My block is .040 over and is a new rebuilt short block I got many years ago and never did anything with it.
My intentions were using a 70-B, 4spd that I have now. But it needs a resto. I was thinking of buying an average driver car and doing a switch.
Ironically, my buddy a few blocks away has a 70-B thats 5k original miles. It was hit when new and sat all these years. Its an F5 red, black C-stripe, column shift, bulge hood, post car. We were looking over the motor during tear down and the pistons are way down. He pulled the pistons out before I got to measure the depth. Everything is so nice inside, we're just doiong rings only on the short block and reusing everything but the oil pump, fuel pump, and water pump.
Thanks for all the info!
What are your times?
Posted By: mr_340
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 12:11 AM
The NHRA spec for the 1970 383 is .004" below deck. I guess you could cut .100" off the deck. I know they used to cut that much off the SS Hemi blocks, but not sure about the 383 blocks.
They also list other legal pistons for Stock. I don't know if all these will work for Pure Stock?
383 60-71
TRW L2315F
TRW L3057F
SEALED POWER 2257P
ROSS 74233
CP PISTONS M17-CP
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 12:36 AM
.100 seems like an awful lot to take off. then count for the material taken off the heads to make an 80cc chamber.
How would all the gaskets work out? I'm assuming both mating surfaces of the heads will have to be milled accordingly, and the intake.
How about the top of the block (v-pan rails).
I'm assuming the listed legal pistons all have the same compression height. I think I have the 2315 pistons now.
Posted By: mr_340
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 12:50 AM
Based on what the Florida B said, you might have to bore and hone the block for your pistons and check the deck height before decking the block. It looks like he took off less than .050". As far as the intake faces, you can't cut the intake face on the head into the valve cover bolt holes. The good part about cutting the intake face is that you reduce the port volume. NHRA lists the Minimum Compression Height for these pistons at 1.900". I think the TRW piston is around 1.915" if I remember right.
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 04:21 AM
Instead of killing the block move the pin up in the rod .025 and stroke the crank.015.All NHRA spec.Are you sure they are .100 below the deck?
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 02:17 PM
Yes, checked with a dial indicator last night and a digital calper (.105).
Ironically, my 69.5 440 for my RR is also .105 in the whole. I've heard this is common for the 2266 pistons on a 440.
I was thinking of using the KB162 piston, even though they are not spec'd for NHRA. Decking the block, etc, etc, could get expensive and if I get too much in the motor, I may as well up the compression and go with stealth heads, etc.
I may pull a piston/rod assembly out and compare them to my buddy's stock motor. Its just now been assembled.
NHRA doesn't exactly run events here in KC, but I thought it would be cool to see what a "stock" 383 could really do.
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 02:39 PM
I thought you wanted to run at the pure stock drags or something
I guess Andy answered your question then...About 13.60 at 100mph.Building horsepower to a spec is never cheap
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 03:04 PM
Well, the short block was already rebuilt when I got it in trade. A real 70 HP 383 thats .040 over. I nice rebuild with receipts, forged pistons, etc. But not balanced or anything.
If it cost 3-5k to get the motor to purestock specs, it may be just as fun and cheaper to do build basically as stock appearing and have fun at the local track.
I'm just now getting started and want to get a feel for what is needed since I've never really checked into it this deep and havn't dragged raced before, but always wanted too.
Thanks for all the input!
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 03:42 PM
It wouldn't cost that much from where you are I wouldn't think.No matter what you are gonna want to get the engine balanced.The fact that it wasn't would make me look really hard at the rest of it for quality issues.Having 8 bushings put in the small ends is not that expensive and in your case it would be a win win situation.As it stands right now you have the potential to have a very low compresion dog on your hands
You may spend some money on your heads though
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 03:47 PM
http://www.purestockdrags.com/ is where you check out old results and rules and such. Also alot of the guys hang out at V8buick.com in the "Those other guys" section.
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 11:19 PM
I thought the heads had to be pretty stock. I know I can do a few tricks to the valves and milling, but i'm thinking thats about it.
No matter what I do, the motor will come down and be reinspeced. At this point it is definetaly about an 8:1 motor. I pulled the head and reverified the depth with a .0001/1" travel indicator and got .095".
Did the deck heigth from the factory have quite a bit of tolerance when they were being built?
Posted By: SomeCarGuy
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 11:24 PM
This sounds like way too much hassle since you aren't class racing.
A nice idea but why not just do the easy way(s) and go faster?
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/02/09 11:52 PM
Deck height was all over the place from the factory.
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/03/09 01:27 AM
Quote:
This sounds like way too much hassle since you aren't class racing.
A nice idea but why not just do the easy way(s) and go faster?
This is where the delimma for me is. I could add stealth heads, a stock appearing aluminum intake, a comp. series TQ, shave 200#s off the car and spend about the same $$, look stock, and go faster.
But....
Then its not quite as challenging.
It would be nice to do the Purestock build, but there are no events in the KCMO area. All of them seem to be 500 miles away.
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/03/09 04:08 AM
Is KCMO Kansas City? If it is you have a race in your backyard.Last year we had a race at Gateway.I think it was in May.
Try it you'll love it
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/03/09 08:46 PM
They do have the Nostalgic race here. Chrysler Classic was coming here, but I think quit.
Last year (07), there were a couple of FAST cars. A hemi challenger from KS and I think a Yenko camaro from MO and possibly a mustang. They got rained out just as they were at the line. And that was the race I wanted to see. 08 didn't have any FAST cars. Gateway is about 250 miles from KC, which isn't so bad.
Posted By: fast68plymouth
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/04/09 04:25 PM
i'm not really sure how you'd end up with a set of TRW L2315's down the hole .100+, unless the block was MUCH taller than the 9.98" spec.
as i recall, i decked my block around .035 to get the pistons to .018 above the block(crank stroked to 3.388).
based on your current deck clearance, assuming a typical BB OE chamber volume of 88cc's, and using a steel shim head gasket.....you'd be at about 7.8cr right now.
Posted By: Chevy454
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/05/09 11:32 AM
Quote:
They do have the Nostalgic race here. Chrysler Classic was coming here, but I think quit.
Last year (07), there were a couple of FAST cars. A hemi challenger from KS and I think a Yenko camaro from MO and possibly a mustang. They got rained out just as they were at the line. And that was the race I wanted to see. 08 didn't have any FAST cars. Gateway is about 250 miles from KC, which isn't so bad.
Hey cdp, that was us in the Yenko...that KC event is cool, but it's kind of a circus with 400-500 cars, so the FAST/Pure Stock guys are kind of a side show and get lost in the mix...but you can't get enough numbers for an event outside the Michigan border to help cover track costs for a true FAST/Pure Stock dedicated event. Anyway, there's been about a dozen of us guys run @ KC the past 2 years, though...
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/06/09 12:31 AM
Hi Chevy454,
Its nice to see that you post here. I saw the magazine article on your Yenko and the certifcation in the window. I see its only good for the one race in the rule book.
If I really had the gonads, I'd race my A12 RR. Its an all #'s car that I'm in the process of restoring, so I can't risk it. I have a 71 GTX thats very similar to the Sassy Grass green one that I think Mike Nasi owns.
I might be better off to sell some of my projects and just work on the GTX. Atleast its a 440-4 rather than a 383.
Posted By: Chevy454
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/06/09 01:46 PM
Quote:
If I really had the gonads, I'd race my A12 RR. Its an all #'s car that I'm in the process of restoring, so I can't risk it.
LOL...might as well, you could join the other 6 or 8 that show up every year!
Posted By: mr_340
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/06/09 09:23 PM
You can disregard my comments earlier. I thought we were talking about IHRA Pure Stock. It's basically what NHRA Stock was back in the early 1970s. It also has a limited following.
Posted By: DPelletier
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/06/09 09:41 PM
Quote:
Quote:
If I really had the gonads, I'd race my A12 RR. Its an all #'s car that I'm in the process of restoring, so I can't risk it.
LOL...might as well, you could join the other 6 or 8 that show up every year!
I plan on racing my #'s 6 pack car this year. although, like you, there is no Pure Stock event anywhere near me. Oh well, I'm sure people at the local track will think I'm crazy, but what the heck, that's what these cars were built for, right!
I have no delusions of keeping up with guys like Rob, Jim, Bob and the others though. 
Posted By: Florida_70Bee
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 01:17 AM
Quote:
If I really had the gonads, I'd race my A12 RR. Its an all #'s car that I'm in the process of restoring, so I can't risk it.
cdp
My Bee is #'s matching plus original paint and interior. Bring the A12 out you'll have a blast!
Rob, got to meet you at Atlanta in Oct 2004 when you were racing the Camaro and I was running the Bee. Nice to see you have stepped up the performance of the Yenko since then! Good Job!
Posted By: Chevy454
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 03:56 AM
Quote:
Rob, got to meet you at Atlanta in Oct 2004 when you were racing the Camaro and I was running the Bee. Nice to see you have stepped up the performance of the Yenko since then! Good Job!
Yeah, the engine at that time was way down on compression @ 10:1 (supposed to be 11:1), and I've got it hooking a tad better now as well...but the car's still just as overweight as it was back then!
Wasn't that event a rain out the final day, maybe? I remember leaving Saturday evening for some reason...??
Posted By: Florida_70Bee
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 07:36 PM
Quote:
Wasn't that event a rain out the final day, maybe? I remember leaving Saturday evening for some reason...??
That was the event! we ran on Saturday because of a threat of rain on Sunday.
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 07:48 PM
I would think you could get a 383 to go into the 12s in the right car on a razor tune
I wish there were more guys running them
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 07:48 PM
Quote:
Well, the short block was already rebuilt when I got it in trade. A real 70 HP 383 thats .040 over. I nice rebuild with receipts, forged pistons, etc. But not balanced or anything.
If it cost 3-5k to get the motor to purestock specs, it may be just as fun and cheaper to do build basically as stock appearing and have fun at the local track.
I'm just now getting started and want to get a feel for what is needed since I've never really checked into it this deep and havn't dragged raced before, but always wanted too.
Thanks for all the input!
buy a set of speedpro 2315's , they are CH at 1.920 , the TALLEST 383 piston available off the shelf , make sure to have the block rehoned wit ha torque plate for MAX ring seal . The weight is roughly the same as the stock cast piston , mill the block .011 to get your .004 in the hole .
It's going to cost about the same to deck the block and cut the valley end rails and intake as changing the pistons and decking the block .
sorry if someone beat me to this , i've been away on holiday
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 07:52 PM
Quote:
Did the deck heigth from the factory have quite a bit of tolerance when they were being built?
Many claim they are but I have yet to see these MYTHICAL blocks , maybe they power UNICORNS ?
What is the number on the piston currently in the block ?
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 07:55 PM
Quote:
Quote:
This sounds like way too much hassle since you aren't class racing.
A nice idea but why not just do the easy way(s) and go faster?
This is where the delimma for me is. I could add stealth heads, a stock appearing aluminum intake, a comp. series TQ, shave 200#s off the car and spend about the same $$, look stock, and go faster.
But....
Then its not quite as challenging.
It would be nice to do the Purestock build, but there are no events in the KCMO area. All of them seem to be 500 miles away.
The shortblock isn't the expensive part , having the HEADS done to be PURESTOCK LEGAL IS the expensive part .
the purestock drags is 800 plus miles one way for me , I'd love it top ONLY be 500 miles away , then maybe I would actually go again ...
But I'd have to have my car together first 
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 07:57 PM
Quote:
i'm not really sure how you'd end up with a set of TRW L2315's down the hole .100+, unless the block was MUCH taller than the 9.98" spec.
as i recall, i decked my block around .035 to get the pistons to .018 above the block(crank stroked to 3.388).
based on your current deck clearance, assuming a typical BB OE chamber volume of 88cc's, and using a steel shim head gasket.....you'd be at about 7.8cr right now.
Dwayne , my guess is he has 2257's in that motor , I just passed on a 383 last week with those pistons , .100 in the hole ...
Posted By: DPelletier
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 08:29 PM
Quote:
the purestock drags is 800 plus miles one way for me , I'd love it top ONLY be 500 miles away , then maybe I would actually go again ...
But I'd have to have my car together first
try 3,000 miles!
BTW, I was wondering where you got to! 
What's so expensive with the heads? milling, decent valves and springs and a good 3 angle valve job, right? What am I missing?
Dave
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 08:58 PM
Yeah John, tell us what is so expensive about the heads? Just stock heads right?
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 09:00 PM
And the Dot is still apart? Less typy mo worky! Lets get it together man!
Posted By: Florida_70Bee
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 09:19 PM
Quote:
I would think you could get a 383 to go into the 12s in the right car on a razor tune
I wish there were more guys running them
Tom,
I think JohnRR's Dart might be the perfect car for it as it is a heck of a lot lighter than my tank. (I would think about 400 to 500 lbs lighter)
Like you said build a spec'ed 383 and throw some gear in it (4:30's or 4:56's ) and a low, low 13's maybe a 12 would be a possibility.
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 09:26 PM
The way Johnahah works we will never know.
I might have to see for myself
Posted By: DPelletier
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 09:59 PM
Quote:
Quote:
I would think you could get a 383 to go into the 12s in the right car on a razor tune
I wish there were more guys running them
Tom,
I think JohnRR's Dart might be the perfect car for it as it is a heck of a lot lighter than my tank. (I would think about 400 to 500 lbs lighter)
Like you said build a spec'ed 383 and throw some gear in it (4:30's or 4:56's ) and a low, low 13's maybe a 12 would be a possibility.
I wonder how much the difference in the A body exh manifolds would cost him? 
You've done a great job with yours IMO Andy, especially considering the stock bore, relatively low compression and bone stock cam.
Dave
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 10:57 PM
Quote:
Yeah John, tell us what is so expensive about the heads? Just stock heads right?
Don't know ask Dwayne , I just give him bare castings and he sends me the bill , I pulled the last set I was doing back before he could get started on them .
But you are correct , at my pace don't anyone be waiting on me to give the results .
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 11:00 PM
Quote:
I wonder how much the difference in the A body exh manifolds would cost him?
Dave
Not sure , the factory rated the engine 5hp less than the RR/superbee engine in 69 , everything is the same except the manifolds an the A body has a dual point instead of the single point .
My dart is about 300 lbs lighter than a B body , I did buy a set of 4.30 gears last spring
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/07/09 11:58 PM
John,
I thought something was up, its been awful quiet around here!
You may be right on the pistons being the different #. I can't verify the pistons because there is no # stamped on them. Right now the motor is sitting on a crate so I cant get a piston out. I need to do this and match it to my friends stock pistons.
My block is .040 over. I see the PAW catalog only shows a .030 for the 2316, but I'm sure I can get a .040 for it.
What about the KB-162? I know its not in the NHRA rule book, but am curious as to why they aren't considered OEM if weight and compression is OK.
Posted By: Tesla_HV
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/08/09 04:51 AM
Quote:
Quote:
I wonder how much the difference in the A body exh manifolds would cost him?
Dave
Not sure , the factory rated the engine 5hp less than the RR/superbee engine in 69 , everything is the same except the manifolds an the A body has a dual point instead of the single point .
My dart is about 300 lbs lighter than a B body , I did buy a set of 4.30 gears last spring
Welcome back John. How are things in the frozen north??
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/08/09 03:40 PM
Quote:
Welcome back John. How are things in the frozen north??
FROZEN , everything is like a glazed donut here this morning , at least we didn't lose power this time .
How are things on the island ? Tell Donna I said hi .
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/08/09 03:42 PM
Quote:
John,
I thought something was up, its been awful quiet around here!
You may be right on the pistons being the different #. I can't verify the pistons because there is no # stamped on them. Right now the motor is sitting on a crate so I cant get a piston out. I need to do this and match it to my friends stock pistons.
My block is .040 over. I see the PAW catalog only shows a .030 for the 2316, but I'm sure I can get a .040 for it.
What about the KB-162? I know its not in the NHRA rule book, but am curious as to why they aren't considered OEM if weight and compression is OK.
the 162's would be better , but you will have to take .020 off the deck to get them where you need them then there is the 5cc CAVERN they call valve reliefs you have to combat .
Just don't deck the block .100 
did you check Summit for the .040 2315 ?
i just looked , they don't have them in stock but they list them , the negative is they aren't cheap , price has gone up about 50 bucks since i bought a set , but that was 2 years ago .
Contact DRAM and see what he can do for you .
My next set will be Diamonds at the CH I want so I don't have to cut a alot off the block , between the .018 off my block and the heads I'm using that are cut about .040 I had to take about .075 off the valley end rails to get the valley pan to fit a way I was happy with .
the goods
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 12:58 AM
With the 2316's being $400 a set now, it would be better to get a set of Diamonds if they are still around $550 and not have to do all the extra machining. And the need for custom push rods, (thought its probably better to use them anyway).
I did see a set of 40-over 2316's on ebay for $325 right now.
I'm curious on the heads. What are the typical legal tricks that could cost you so much? I'd think the only things that would be legal would be a disired CC, backcutting the valves, maybe a radius edge and a 5 angle valve job. Seems anything beyond that would be questionable on "pure stock". But I'm not expert engine builder so i'd think there could be some more little tricks.
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 01:26 AM
Quote:
With the 2316's being $400 a set now, it would be better to get a set of Diamonds if they are still around $550 and not have to do all the extra machining. And the need for custom push rods, (thought its probably better to use them anyway).
I did see a set of 40-over 2316's on ebay for $325 right now.
I'm curious on the heads. What are the typical legal tricks that could cost you so much? I'd think the only things that would be legal would be a disired CC, backcutting the valves, maybe a radius edge and a 5 angle valve job. Seems anything beyond that would be questionable on "pure stock". But I'm not expert engine builder so i'd think there could be some more little tricks.
thats not a bad price for those pistons , if it's a buy it now then maybe you should pull the trigger , otherwise weigh the cost of all the machining required and the 2315's vs the cost of diamonds TWEAKED to exactly what you need .
As far as the heads go it's the quality of the work that you are paying for . You could just run a set down to the local parts store and get a VJ done for $275 bucks that would pass tech , but having the VJ done by someone that knows exactly how to make them flow with what is legal costs alittle more . I think PS legal is only a 3 angle VJ and that's all depends on who you are . I know of one A12 racer that upset the cart by going TOO FAST and was told his once legal 3 angle VJ no longer was legal and he had to go back to a more out the door of the factory VJ.
But then there is knowing WHICH head to use , there is a CERTIAN 906 that flows BETTER as cast than the rest ... I have a set of those that are waiting to go under the knife so to speak ... 
Dwayne made 500hp with his 3 angle VJ and no porting 906's and they weren't the GOOD castings .
oh , one more thing if your engine wasn't balanced or decked at least to be SQUARE NOW is the time to deck the block , get your new pistons ( decide on diamonds or speedpros before the actual decking), then have it balanced .
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 01:36 AM
Oh John come on don't tease the guy
Posted By: mr_340
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 03:32 AM
Don Little in Modesto, California seems to do a lot of heads for the Stockers, especially BB Mopars. I don't know he would charge though, but his heads are on a lot of fast stockers.
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 02:03 PM
Quote:
Oh John come on don't tease the guy
It's all the excitement I'm allowed to have on here anymore .
Posted By: DPelletier
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 04:41 PM
Quote:
But then there is knowing WHICH head to use , there is a CERTIAN 906 that flows BETTER as cast than the rest ... I have a set of those that are waiting to go under the knife so to speak ...
I would gladly pay you Tuesday for more information on those heads today!
Dave
Posted By: scatpacktom
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 05:40 PM
Yeah John, what the F ?
Posted By: dannysbee
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 06:33 PM
I think a stripped 69 post RR with fresh air hood and the better driver side manifold might be a good race for a 383 Abody.
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/09/09 07:27 PM
Quote:
Yeah John, what the F ?
no implied profanity allowed
Posted By: fast68plymouth
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/10/09 03:25 AM
Quote:
I think a stripped 69 post RR with fresh air hood and the better driver side manifold might be a good race for a 383 Abody.
that would be my pick.
if one had a really clean set of 906 cores(meaning, no previous valve jobs, & no serious valve seat recession), it would cost about $1100 parts and labor at my shop to bring them into shape for F/S.
thats heads that are 100% legal to the letter, and within the intent and spirit of the rules.
my suspicion is the better running cars have explored new interpretations of the rules.......and not just the rules that pertain to the heads either.
Posted By: fast68plymouth
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/10/09 03:43 AM
the heads are just stock....right?
how much difference in performance can there be as long as they're refurbished.
here's a good read if you havent seen it already.....
nice 906's
Posted By: cdp
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/11/09 02:21 AM
Thats some good info on the heads. Looks like money well spent after seeing the work.
On the shortblock that I have, I may be better off to buy a full shortblock kit for about $625 with the pistons, rings, bearings, gaskets, etc, etc, than buy pistons and rings only. Seems the costs of the rest of the parts are very little after subtracting the pistons/rings out.
I wouldn't even chance cutting the block .100" That would be kind of crazy on a 70-HP block.
I think the best thing to do would be to have block gone over, then have the rotating assembly balanced, and have someone like Fast68plymouth build some heads that are ready to bolt on.
Still, its a $3500 investiment. But the motor would be near perfect other than tuning.
Posted By: JohnRR
Re: anyone run a Purestock/NHRA Blue print 383-B-body? - 01/12/09 03:08 PM
Quote:
Thats some good info on the heads. Looks like money well spent after seeing the work.
On the shortblock that I have, I may be better off to buy a full shortblock kit for about $625 with the pistons, rings, bearings, gaskets, etc, etc, than buy pistons and rings only. Seems the costs of the rest of the parts are very little after subtracting the pistons/rings out.
I wouldn't even chance cutting the block .100" That would be kind of crazy on a 70-HP block.
I think the best thing to do would be to have block gone over, then have the rotating assembly balanced, and have someone like Fast68plymouth build some heads that are ready to bolt on.
Still, its a $3500 investiment. But the motor would be near perfect other than tuning.
Sounds like a good plan.
as far as the decking of the block , tell the shop not to remove the info off the ID pad , I had a 69 383 HP block decked .015 and had them leave the ID pad intact , not hard to do .