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have 906 heads right now should I go to stealth heads? #59677
05/19/08 02:15 PM
05/19/08 02:15 PM
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79machocharger Offline OP
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I have a set of 906 heads right now and was wondering if it would be worth it for me to spend $900.00 for the stealth heads. Do they really make that much of a difference. My 906 heads are going to need to be gone through. What are the advantages. Are they going to really give me that much more hp.
Thanks for any help

Re: have 906 heads right now should I go to stealth hea [Re: 79machocharger] #59678
05/19/08 02:50 PM
05/19/08 02:50 PM
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JohnRR Offline
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it's going to cost you that much or close to that just to do a stock rebuild on a set of 906's , the choice is up to you as to what you do once you receive the new heads , meaning have them checked over , or take your chances and run them as is .


Re: have 906 heads right now should I go to stealth hea [Re: JohnRR] #59679
05/19/08 03:13 PM
05/19/08 03:13 PM
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Before you spend a nickel on your 906s get a WRITTEN QUOTE from a reputable shop and compare it with the price of a set of new heads. Keep in mind that the 906s will require quite a bit of porting to flow with the aftermarket heads and porting doesn't come cheap.

R.

Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59680
05/19/08 05:00 PM
05/19/08 05:00 PM

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if it was my decision.. i'd spend the coin on the 906's. nuttin like factory iron.
advantage ussually goes to the aluminum heads. both for weight and gettin away with a
bit more c/r. but when the porting tools come out, there both gonna cost $$$. but as
JohnRR said, check and fix whats needs done, or take your chances and run either head "as is".

Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59681
05/19/08 05:43 PM
05/19/08 05:43 PM
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Kirkland, Washington
Pacnorthcuda Offline
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The HP potential of stealth vs. 906 can and has been debated to great length. Some situations simply don't warrant extra effort or $$$ for better flow numbers (I don't know the particulars of your engine build, so that may or may not apply to you) BUT, the weight savings is REAL, and its real for all situations--less so for some 4500# + luxo barge.

Weight saving is arguably better than increased power output because less weight means faster acceleration, faster deceleration, better handling, and more mpg. More power USUALLY only equates to faster acceleration.

To me, it doesn't make sense to spend similar money on heads and ignore the weight advantage. Its there waiting for you....take it.

And after all, its not like the Stealth option is likely to make LESS power!!!

Re: have 906 heads right now should I go to stealth heads? [Re: Pacnorthcuda] #59682
05/19/08 08:17 PM
05/19/08 08:17 PM
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badblack68 Offline
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Call Bob at Outrageously Vintage in Searsmont. He`ll tell you the real story on 906 heads verses "stealth" heads. www.outrageouslyvintage.com

Re: have 906 heads right now should I go to stealth heads? [Re: badblack68] #59683
05/19/08 09:35 PM
05/19/08 09:35 PM
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Fairfield Maine
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hemi4speed Offline
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Quote:

all Bob at Outrageously Vintage in Searsmont. He`ll tell you the real story on 906 heads verses "stealth" heads. www.outrageouslyvintage.com


it wont cost you a dime Ryan for the advice..and Bob is as honest and as knowlegeable as the come..

Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59684
05/19/08 10:15 PM
05/19/08 10:15 PM
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Mid Michigan
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Coronet-R/T-Rag Offline
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I would get the stealth or eddy heads. Your 906's are close to 40 years old and have had thousands of heat cycles. They will crack one of these days (especially after you port them). After that you have some cool doorstops that flow really good.

Re: have 906 heads right now should I go to stealth heads? [Re: Coronet-R/T-Rag] #59685
05/19/08 11:23 PM
05/19/08 11:23 PM
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Carroll,Iowa 51401
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Cyl.Porter Offline
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Carroll,Iowa 51401
I would go with the Stealth heads. They are much beeter than the stock 906's. You have old technology that is whay out dated for the times. You will actually spend more on the 906's than you would ever spend just buying the Stealth heads. I use to work in a machine shop. And what Coronet R/T said about the heating cylces is true. The stealth heads are a good head for the money.

Re: have 906 heads right now should I go to stealth hea [Re: Cyl.Porter] #59686
05/19/08 11:28 PM
05/19/08 11:28 PM
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85086
moparpollack Offline
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But will the stealth heads work on a 383? or are the valves too big?


56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
Re: have 906 heads right now should I go to stealth hea [Re: moparpollack] #59687
05/19/08 11:40 PM
05/19/08 11:40 PM
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Carroll,Iowa 51401
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Dont know the 383 has a 4.25 bore while the 440 has a 4.32 bore. Check with your machine shop and ask them. I think it should work. Look for my add in the section for business. It's called Shotties Porting Services and give me a call

Re: have 906 heads right now should I go to stealth hea [Re: moparpollack] #59688
05/20/08 07:53 AM
05/20/08 07:53 AM
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JohnRR Offline
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Quote:

But will the stealth heads work on a 383? or are the valves too big?




they will be fine on that bore size , adding a notch to unshroud the valves like the factory did on the max wedge engines in 63/64 would help ,but is probably not necessary

Re: have 906 heads right now should I go to stealth hea [Re: JohnRR] #59689
05/20/08 08:02 AM
05/20/08 08:02 AM
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Holland MI Ottawa
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2boltmain Offline
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Way back in the mid nineties one of the magazines had DLI (Dick Landy Industries) do up a set of 452s. Nice porting some polishing, new oversize valves ect ect. The cost for this back then was approaching 2 grand and that was being done to your supplied cores. The stealth heads may not be made in America, but neither are alot of new Fords Chivies and Dodges.


Keep old mopars alive.
Re: have 906 heads right now should I go to stealth hea [Re: 2boltmain] #59690
05/20/08 08:10 AM
05/20/08 08:10 AM
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Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
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why not look online or a swap meets for a set of working pre-owned heads? 915, 906, 452. Doesn't really matter. Depending on what you want out of the car. If you plan on building up the 383 later or going with a 440 at some time the Stealth heads wouldn't be a bad idea. However you can pick up a set of ported iron heads for 3-500.

Re: have 906 heads right now should I go to stealth hea [Re: Mr.Yuck] #59691
05/20/08 11:36 AM
05/20/08 11:36 AM
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JohnRR Offline
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Quote:

However you can pick up a set of ported iron heads for 3-500.




i'll buy all the sets you have for that .

Re: have 906 heads right now should I go to stealth hea [Re: JohnRR] #59692
05/20/08 12:03 PM
05/20/08 12:03 PM
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Brookeville, Md
Mr.Yuck Offline
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Paid $500 for my Hensley ported 2.14/1.81 valved 516's hardley used w/ really good flow numbers. I've also seen nice 906's and 452's for about the same or less.

Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59693
05/20/08 01:08 PM
05/20/08 01:08 PM
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Ontario, Canada
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Stanton Offline
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I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!

Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!

As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!

Re: have 906 heads right now should I go to stealth heads? [Re: Stanton] #59694
05/20/08 01:19 PM
05/20/08 01:19 PM
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Brookeville, Md
Mr.Yuck Offline
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Quote:

I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!

Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!

As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!




If he doesn't plan on building a 600 Hp motor why should he spend over 1k on a set of heads? Why does everybody need aluminum heads? If I was going to build an engine that required those flow numbers sure I'd buy a set. But if I building a simple 440 or 383 for fun and a few track dates I'll save the $$$ for something else.

Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59695
05/20/08 02:24 PM
05/20/08 02:24 PM
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North Riverside IL & Lowell IN
GTXKen Offline
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All good points above.

I say fit the parts to the budget no matter what it is. If you can swing the Stealth heads go for it, if not look for some already worked 906 heads. If you have to rework your heads to the tune of new seats, valves and a valve job then I think you are close enough to where the smart money in on the stealth heads. If you have a bigger budget then go for an indy head and so on...

Don't spend more than you can afford, you don't need to. And don't spend 75% of the cost of a new part reconditioning a new one.


ken

Re: have 906 heads right now should I go to stealth heads? [Re: Mr.Yuck] #59696
05/20/08 02:35 PM
05/20/08 02:35 PM
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So. Cal. For Now But Texas Bou...
69sixpackbee Offline
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I'll throw in my $.02.

I took delivery of one of the first sets of stealths. Took them all apart and checked them THOROUGHLY. Not bad. I checked each valve with Dykem to confirm seat sealing. A few spins with the hand lapper showed all but one were spot on. After a few trips to the head surfacing machine I dialed in my chambers to 74'cc. I then started blending in the already ample (stock-ish form) bowls to the valve inserts as they (the inserts) protruded a bit into the bowls. I polished up the ports and knocked down the casting flash in them as well as an intake gasket match. I ended up removing .060" on the surfaces and .075" on the intake faces. Some of the valve cover rail was milled off in doing so but still have plenty of meat to seal the valve cover. After hand lapping the questionable valve, putting in my Isky 935-DR springs from my "906"'s and a brand new set of Comp Cams 10-degree retainers and locks, they were good to go.
I figured I spent about 6hrs with the "Tootsie Rolls" which included relieving the intake pushrod areas for use with 3/8" rods and 1.6:1 rockers, another 2+ hrs for setup and about $200.00 in maching and parts costs and I am still a few bucks ahead.

I don't think you can beat the cost factor. I too am not looking for a balz out killer RB just a decent runner in a stock-bodied "B" body with enough punch to turn some heads. I was running 12.70's before the head swap so soon I will send it down the track to see what improvements I made.

I went from 9.6:1 CR with the old iron heads to 10.5: 1 with the "Stealth's". I have a .048" quench (attainable using Cometic's and a stock deck ht.) and "Sixpack" 2355F TRW flattops. I have the .509/.292 cam "straight up", 3000 stall converter and 4.10"s in the Dana.

Hopefully I will drop the mill into the car this weekend.

Lots have been said about the Stealths but I still feel I got a good deal. No head swap is without a fair amount of work and exterraneous cash outlay. That is a given.

Good luck!

Bud

Last edited by 69sixpackbee; 05/20/08 02:37 PM.
Re: have 906 heads right now should I go to stealth hea [Re: Stanton] #59697
05/20/08 03:25 PM
05/20/08 03:25 PM
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JohnRR Offline
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Quote:

I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!

Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!

As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!





Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59698
05/20/08 03:59 PM
05/20/08 03:59 PM
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Tucson, AZ
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cruzin Offline
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79machocharger,

Perhaps the following will be useful in your decision. I helped my buddy change the heads (906 w/larger valves) on his 3900 lbs., 1968 440 RT recently. His motor consist of 10:1, Lunati Voodoo #60302 262-268 cam, Performer RPM intake, BG 750 Mighty Demon, headers, 727 w/3000 stall, 3:55 SG.

The 906s that were removed were in good shape and had upgraded springs. Heads were rebuilt a little more than 1 year ago. On went the Stealth heads using prior rocker assembly (roller 1.5). Stealth heads were untouched and simply bolted on. Timing is 36 total.

In March the car went 13.9. May 2, car ran 13.55. I believe the mph was up 3 or 4 mph with the new heads. Car is more responsive with the new heads. Weight dropped poundage off the front end too.

Hope this helps.

Re: have 906 heads right now should I go to stealth heads? [Re: cruzin] #59699
05/20/08 04:12 PM
05/20/08 04:12 PM
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79machocharger Offline OP
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Thanks for all the info guys, I decided to go with the stealth heads. I'm building a pretty healthy 440 and wanted somthing that would would work real nice with it and it sounds like these will be the better bet for me between the two .

Last edited by 79machocharger; 05/20/08 04:30 PM.
Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59700
05/20/08 04:48 PM
05/20/08 04:48 PM
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Manitoba, Canada
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I went with the stealth heads for my build as well. I'm still not sure if it was the right choice, but it's done. I didn't want to have to deal with spending the $ shipping a set of spare stock heads out to a trusted head porter, having him port and rebuild the heads and shipping them back. Probably would have spent the same in the end either way. I'm kind of wondering whether I should have just saved my money and went with a set of e-victors instead, but they may have been a little overkill. At the end of the day, there's more than one way to skin a cat so do it however you want. I agree, not everyone needs aluminum heads, but these days 500hp is as impressive as 400hp was 10 years ago, so everyone wants to keep up with the times. And for those #'s, a set of unported stock valve heads won't do it.

Re: have 906 heads right now should I go to stealth heads? [Re: cruzin] #59701
05/20/08 07:00 PM
05/20/08 07:00 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
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Quote:

79machocharger,

Perhaps the following will be useful in your decision. I helped my buddy change the heads (906 w/larger valves) on his 3900 lbs., 1968 440 RT recently. His motor consist of 10:1, Lunati Voodoo #60302 262-268 cam, Performer RPM intake, BG 750 Mighty Demon, headers, 727 w/3000 stall, 3:55 SG.

The 906s that were removed were in good shape and had upgraded springs. Heads were rebuilt a little more than 1 year ago. On went the Stealth heads using prior rocker assembly (roller 1.5). Stealth heads were untouched and simply bolted on. Timing is 36 total.

In March the car went 13.9. May 2, car ran 13.55. I believe the mph was up 3 or 4 mph with the new heads. Car is more responsive with the new heads. Weight dropped poundage off the front end too.

Hope this helps.




main problem w/ that set-up is the 3.55's You'd think it'd run high 12's low 13's w/o the high end heads.
Probably be better off with a different cam and lower stall. My bone stock 67 GTX (except for summit 488 cam) w/ 3.55's on radials thru logs went 13.86-13.90

Re: have 906 heads right now should I go to stealth heads? [Re: Stanton] #59702
05/20/08 07:11 PM
05/20/08 07:11 PM

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Quote:

I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!

Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!

As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!




yup.. nothin' like some good ole iron heads opening a can of whoop butt against some eddies, stealths, or whatever.
BELIEVE me my friend.. 90% of the people here get aluminum heads just to be cool.. power is secondary.

Re: have 906 heads right now should I go to stealth heads? #59703
05/20/08 07:19 PM
05/20/08 07:19 PM
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GTX MATT Offline
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Quote:

Quote:

I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!

Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!

As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!




yup.. nothin' like some good ole iron heads opening a can of whoop butt against some eddies, stealths, or whatever.
BELIEVE me my friend.. 90% of the people here get aluminum heads just to be cool.. power is secondary.




Lots of people running Eddie RPMs on a 450 hp 440 with a broom stick for a cam, whats the point? Lots of guys turning 500 hp with irons. The aluminums are superior but it seems like alot of people that have them dont even need them, the guys whos combo itd really be good for have the Irons because they dont have the cash. I just hate when I go to a car show and see a 440 with aluminum heads and ask about the cam and if the motor is dynoed or not, and its a very mild combo. I get all excited for a 550 hp mill and am saddened. For what its worth a guy with an IRON headed 383 at my local cruise I chatted with maybe two weeks ago said his 383 with 906s and the regular street/strip specs dynoed at 460 hp and almost 500 ft lbs of torque. Hes gonna bring the cam card and dyno sheet next time he comes because he didnt remember the specs on the cam.

I tend to wonder if the irons are really better suited on a 383 than the aluminum heads in most applcations. Probably not, but I still wonder.


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: have 906 heads right now should I go to stealth heads? [Re: 79machocharger] #59704
05/20/08 08:19 PM
05/20/08 08:19 PM
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badblack68 Offline
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Quote:

Thanks for all the info guys, I decided to go with the stealth heads. I'm building a pretty healthy 440 and wanted somthing that would would work real nice with it and it sounds like these will be the better bet for me between the two .



Just a suggestion, take 10 minutes and call Bob at Outrageously Vintage BEFORE you write the check on the stealth heads. He`s a great guy and has been racing Mopars all his adult life. I`m sure you know him because Reed asked me how I got Bob to build me an engine.

Re: have 906 heads right now should I go to stealth heads? [Re: badblack68] #59705
05/20/08 08:26 PM
05/20/08 08:26 PM
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Kirkland, Washington
Pacnorthcuda Offline
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Quote:

Quote:

Thanks for all the info guys, I decided to go with the stealth heads. I'm building a pretty healthy 440 and wanted somthing that would would work real nice with it and it sounds like these will be the better bet for me between the two .



Just a suggestion, take 10 minutes and call Bob at Outrageously Vintage BEFORE you write the check on the stealth heads. He`s a great guy and has been racing Mopars all his adult life. I`m sure you know him because Reed asked me how I got Bob to build me an engine.




And keep in mind you're taking to a guy who's got a significant portion of his business in refurbishing iron heads. Must be ruff these days with the other choices out there!

Hey, I run ported 906's on my car, I will use them till something happens, but I will NOT put any money into them. It will be the perfect opportunity to UPGRADE to AL heads!

Re: have 906 heads right now should I go to stealth heads? [Re: badblack68] #59706
05/20/08 09:15 PM
05/20/08 09:15 PM
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Quote:

Quote:

Thanks for all the info guys, I decided to go with the stealth heads. I'm building a pretty healthy 440 and wanted somthing that would would work real nice with it and it sounds like these will be the better bet for me between the two .



Just a suggestion, take 10 minutes and call Bob at Outrageously Vintage BEFORE you write the check on the stealth heads. He`s a great guy and has been racing Mopars all his adult life. I`m sure you know him because Reed asked me how I got Bob to build me an engine.




Just called Bob today...Took 45 min out of his day to talk and explain ALOT of info to me...My money is gonna be with him. Also explained i picked the wrong cam for my build and we went into that also...Give him a call and ask the questions...


78 D200 Clubcab, 400, 727, Dana 60 welded...Droped 3" front..Rear soon to come
Re: have 906 heads right now should I go to stealth heads? [Re: z1bigtom] #59707
05/20/08 11:02 PM
05/20/08 11:02 PM
Joined: Oct 2005
Posts: 8,828
Ontario, Canada
S
Stanton Offline
Don't question me!
Stanton  Offline
Don't question me!
S

Joined: Oct 2005
Posts: 8,828
Ontario, Canada
Well, as you can tell by my previous post I'm pretty gung-ho on the Stealth heads. Here's my logic...

used 906's - a deal at $50.00
hot tank, magnaflux and surface $150.00
bowl hogged for 2.14/1.81 valves $75.00
valves - stainless $200.00
at this point there is nothing done to the guides, ports, spring seats or valve seats.

I looked at what I had invested and what still needed to be done and weighed that against the Stealth heads. The Stealth heads just plain made sense. I was able to recover my expense from a guy who races in a class that requires stock iron heads.

Re: have 906 heads right now should I go to stealth heads? [Re: Stanton] #59708
05/22/08 10:39 PM
05/22/08 10:39 PM

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sooo you sold a pair of 906's for $475? who are these class racers. i got 2 pairs i'll let go for $400/ pair.
tanked, big valve, etc.

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