Moparts
Small block head porting templates?
Posted By: DustyChicken
Small block head porting templates? - 02/13/08 10:10 PM
I know there are templates available for big block heads, but are there any for the small block? I want to do some porting on my 360 heads, but have never done it before.
Posted By: mopowergtx
Re: Small block head porting templates? - 02/13/08 11:48 PM
I asked this a couple months ago and it was a definate no from everybody. Sorry.
Posted By: RokketRide
Re: Small block head porting templates? - 02/13/08 11:56 PM
I still have a set of the now discontinued magnum porting templates
Posted By: TC@HP2
Re: Small block head porting templates? - 02/14/08 05:13 PM
Quote:
I still have a set of the now discontinued magnum porting templates
Those, the later swirl port heads, and W series are the only small block templates made. I've never seen or heard of templates for the regualr LA series heads. I believe Mopar quit producing all of the ones they did make several years ago.
Posted By: RokketRide
Re: Small block head porting templates? - 02/14/08 05:14 PM
Dont know why, the results were outstanding. IMHO
Posted By: GO_Fish
Re: Small block head porting templates? - 02/15/08 02:22 AM
Your answer is the exact reason they stopped. They were shooting themselves in the foot financially (and I predict Edelbrock will never sell templates for the same reason. If anyone were to, it would be Summit or something). MP sells hp heads that they have developed ($$$), and they want people to buy
heads to help them recover their investment (and heads probably have a higher profit margin anyways). They decided they probably didn't want someone buying a $40 template and DIY, when they could sell you a $400 set of heads instead.
Posted By: Clair_Davis
Re: Small block head porting templates? - 02/15/08 03:26 AM
Quote:
...They decided they probably didn't want someone buying a $40 template and DIY, when they could sell you a $2400 set of heads instead.
Fixed that for you... 
Clair
Posted By: GO_Fish
Re: Small block head porting templates? - 02/15/08 07:22 PM
LOL, I thought my $400 may have been a little low!
Posted By: dmerc
Re: Small block head porting templates? - 02/15/08 08:00 PM
Care to share those templates with a fellow Mopar fan. Come on Buddy! Help a fella out!
Posted By: Clair_Davis
Re: Small block head porting templates? - 02/15/08 08:56 PM
MP's heads were definitely cheaper if you got them bare/unmachined, but I sure don't think it was the cheap templates that kept the heads from flying off the shelf...
Clair
Posted By: moparmandjh
Re: Small block head porting templates? - 02/15/08 10:30 PM
Quote:
Care to share those templates with a fellow Mopar fan. Come on Buddy! Help a fella out!
Posted By: RapidRobert
Re: Small block head porting templates? - 02/16/08 01:23 AM
somebody way back said that mp had put the wrong(or wrong sized)templates in the magnum template pkg & that's why they were disco'd but if you got good results maybe that wasn't the case
Posted By: GO_Fish
Re: Small block head porting templates? - 02/16/08 01:54 AM
Quote:
somebody way back said that mp had put the wrong(or wrong sized)templates in the magnum template pkg & that's why they were disco'd but if you got good results maybe that wasn't the case
The Mag templates themselves are fine. It was the paper instructions that came with them that were LOADED with errors and hard to follow.
Posted By: 340SIX
Re: Small block head porting templates? - 02/16/08 02:06 AM
Quote:
MP's heads were definitely cheaper if you got them bare/unmachined, but I sure don't think it was the cheap templates that kept the heads from flying off the shelf...
Clair
I agree 100% but the bare heads left alot to be done as well.
and were so ruff.........
Posted By: RapidRobert
Re: Small block head porting templates? - 02/16/08 02:09 AM
Quote:
Quote:
somebody way back said that mp had put the wrong(or wrong sized)templates in the magnum template pkg & that's why they were disco'd but if you got good results maybe that wasn't the case
The Mag templates themselves are fine. It was the paper instructions that came with them that were LOADED with errors and hard to follow.
that settles it,Rockett you need to come off of em 
Posted By: RokketRide
Re: Small block head porting templates? - 02/16/08 04:30 AM
I'll see what I can do about duplicating them. Maybe they will make enough of a transfer on a copy machine and everyone can make a set on their own.
I even have the original instructions. This is MP# P4876413
Posted By: RapidRobert
Re: Small block head porting templates? - 02/16/08 06:09 AM
Rockett that would be greatly appreciated. I will run that # & see if there's any chance the locater can find a set. I always wonder where stuff dissapears to when at one time they were everywhere & later on down the line all gone.
Posted By: davesdartgt
Re: Small block head porting templates? - 02/16/08 11:04 PM
Quote:
I know there are templates available for big block heads, but are there any for the small block? I want to do some porting on my 360 heads, but have never done it before.
I just found the set I used on my 360 "LA" series heads about 8 or 9 years ago & are MP P4876412 "Swirl Port Heads"
PM me if anyone wants a photocopy of the instructions & templates.
Man that was alot of work.
Posted By: GO_Fish
Re: Small block head porting templates? - 02/17/08 01:14 PM
Quote:
Quote:
I know there are templates available for big block heads, but are there any for the small block? I want to do some porting on my 360 heads, but have never done it before.
I just found the set I used on my 360 "LA" series heads about 8 or 9 years ago & are MP P4876412 "Swirl Port Heads"
I suspect those templates were for the pre-Magnum "308" heads, and are not meant for use on the earlier LA castings. The MP A engine book lists P4876412 as "360 cast iron cylinder head porting template" which is kind of a vague discription making it sound like it is good for all 360 heads. I don't think that is true.
Posted By: 360view
Re: Small block head porting templates? - 02/18/08 12:12 PM
It would be a great service to other Mopar owners if copies of those discontinued intake port templates were posted on Moparts.
I would suggest that they be photocopied onto paper with grid lines so that those of us downloading them can copy them into Microsoft 'Paint' and then enlarge or reduce them so that the scale is correct. The green grid line paper like engineering students use.
I would be willing to snail mail some money to help with expenses doing this
Posted By: GO_Fish
Re: Small block head porting templates? - 02/18/08 03:07 PM
That would be a great idea, but I don't think it would be very long before Moparts heard from Chrysler LLC, telling them to cease and desist from using Mopar licensed property. Mopar Performance does not want these things to still be available.
Posted By: TC@HP2
Re: Small block head porting templates? - 02/18/08 06:31 PM
For that matter, there are any number of reputable engine builders who have built engines with ported LA heads. So why aren't they creating templates and selling them? Probably the same reason MP/DC discontinued them, you can buy newer, better flowing heads for close to the same cost of rebuilding and porting a set of old iron dogs.
I'd have to dig up some old catalogs and look at the the numbers, but I seem to recall that stock Magnum R/T heads would outflow a set of ported LA heads right out of the box.
Posted By: RokketRide
Re: Small block head porting templates? - 02/18/08 06:38 PM
Thats probably all true.
But when I built my magnum, new head castings were $85 each and the template kit was $20.
With the same cam and intake as the 380 crate motor, I blew its doors off for less money starting with an MP short block for $1250.
Posted By: Kirk_Ingram
Re: Small block head porting templates? - 02/19/08 05:17 AM
Quote:
Quote:
I know there are templates available for big block heads, but are there any for the small block? I want to do some porting on my 360 heads, but have never done it before.
I just found the set I used on my 360 "LA" series heads about 8 or 9 years ago & are MP P4876412 "Swirl Port Heads"
PM me if anyone wants a photocopy of the instructions & templates.
Man that was alot of work.
If your going to photocopy, use a color copier (in black/white mode). I've found that the imaging drum from a color copier is more accurate then a typical B/W copier. Also, a simple photocopy cannot be used as a working template. It needs to be rigid. I recommend a plain bond paper, encapsulated/laminated in 20 mil thickness. Do not use cardstock; it will only break apart.
I used this method 7-8 years ago with the BB templates and it works very well. I still have the original kit intact, and worked off the the repro's I made.
I don't sell these; they are/were DCC's propriety.
I bought the apparent LAST available SB "308" template kit, out of Texas, IIRC, late spring 2006. I decided not to use it for the 360 project I was doing, but lost the template kit! Actually I don't think I lost it, it just grew legs and walked away. It's gotta be around here somewhere 
Just remember when photocoping, the imaging drum will stretch the final copy, so chose your copier carefully. Your water jackets will thank you.
Posted By: TC@HP2
Re: Small block head porting templates? - 02/21/08 01:51 AM
Bummer they are gone.
Here's what they looked like. Unlike the big block ones, they were pre-cut. Sorry, I don't have any left, just a picture.
Posted By: TC@HP2
Re: Small block head porting templates? - 02/21/08 01:53 AM
Here's the Magnum version.
Posted By: DustyChicken
Re: Small block head porting templates? - 02/21/08 05:26 AM
Well, that certainly is a bummer.
I'm still planning on porting my small block heads. Any decent references on how to do a light port job? I just want to clean up the intake ports, chambers, and polish up the exhaust ports. I'm not looking for extreme air flow, but at least a basic improvement over stock.
Posted By: Anonymous
Re: Small block head porting templates? - 02/21/08 05:33 AM
Quote:
Bummer they are gone.
Here's what they looked like. Unlike the big block ones, they were pre-cut. Sorry, I don't have any left, just a picture.
didn't they leave the big block ones like that in case one decided to use the 2.14/1.81 valves? 
Posted By: pishta
Re: Small block head porting templates? - 08/30/09 04:00 AM
Man, that is just what I could use. Is that the best picture you got? Can you send me the original 1:1 picture? My sis does professional drafting and can probably dimension these and get a very close full size hard copy. all I need to know is one critical dimension. How do they work? Looks like you put these in your valve guide and grind to make them flush fit into the port, and then go on to the next orientation? Too bad they are no longer in production. So are 308 castings better than 360's for a .284/484 type cam? I can get a pair cheap, but already have some late 360 LA style heads.
Posted By: RapidRobert
Re: Small block head porting templates? - 08/30/09 04:10 AM
Quote:
So are 308 castings better than 360's for a .284/484 type cam? I can get a pair cheap, but already have some late 360 LA style heads.
than the 70's 360 heads? yes.
Posted By: goldmember
Re: Small block head porting templates? - 08/30/09 04:16 AM
The 308 heads are marginally better in STOCK form than the early heads. Now for the bad news,they are cracked or will shortly,so do you want to put the time and effort into them? I port my own so if I have a head crack it's not a big loss.Same goes for spending $$$ on the magnum heads,I'm not suggesting that a good valve job and minor porting won't help them. As far as the MP porting templates,I own a set for the magnum heads,funny how well they fit the stock magnum R/T heads.
Posted By: MNobody
Re: Small block head porting templates? - 08/30/09 05:24 AM
I have the 587 castings that i want to use on a 408 stroker, are they worth porting or just clean them up and call it good?
Posted By: goldmember
Re: Small block head porting templates? - 08/30/09 05:48 AM
They are worth porting if you want to make HP. The problem is the cost to have someone do the porting,valves,valve guides,valve job,milling,etc. Most will buy a set of edelbrocks due to the $$$ to get the factory stuff to come around.
Posted By: MNobody
Re: Small block head porting templates? - 08/30/09 05:55 AM
No money for new heads right now, figured i'd do what i could with these and upgrade to aluminum later on.
Posted By: 1971 Demon
Re: Small block head porting templates? - 02/24/16 02:44 AM
Good evening.....first time user here......im searching for the P4876412 templates & instructions.....are you still able to help? TY!!!!!
Posted By: screamindriver
Re: Small block head porting templates? - 02/24/16 04:30 AM
Hello and welcome to the board...His last post was 2 years ago but you might get lucky and he'll see this...Or you may strike gold and someone else has the template...But here's a
for you..
Posted By: A/MP
Re: Small block head porting templates? - 02/24/16 05:12 AM
A similar posting is on unlawful.
Posted By: 52savoy
Re: Small block head porting templates? - 02/24/16 06:33 AM
I sold a few sets of magnum templates here and still might have a couple left but not ready to sell off anymore at this point. I did try to scan a set for a member but after spending 4 or 5 hours the scale was still off after printing so I gave up.
Posted By: Twostick
Re: Small block head porting templates? - 02/24/16 08:28 AM
Posted By: DaytonaTurbo
Re: Small block head porting templates? - 02/24/16 05:28 PM
I posted up a pdf in january, printable and size/scale is correct.
Posted By: TC@HP2
Re: Small block head porting templates? - 02/24/16 09:46 PM
I've been advertising to buy these here on moparts for a few years now. I always get responses from sellers in Europe who want $100 for a set. I'll have to check out the download site and see how they look.
Posted By: 1971 Demon
Re: Small block head porting templates? - 03/04/16 02:25 PM
Id really like to get a copy of the pirting templates if you do not mind....TY!