#21  
Old 03-05-2021, 03:20 PM
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1968GTO421 1968GTO421 is offline
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Quote:
Originally Posted by Formulajones View Post
Well I know for a fact they'll at least support 507 HP in stock form.

I just did this on a 455 not long ago. 9.98:1 compression pump gas, ported iron 7F6 HO round port heads, a 239 @ .050 hydraulic roller, stock aluminum HO intake with heat cross over intact, and a stock Q-jet that I modified with Cliff's kit. And I did that with the factory iron exhaust manifolds in place with it's stock points distributor.
I'm impresed you could do that kind of power with factory logs. Did you do any work on them or were they fully stock?

I always thought to use factory logs you had to do the "B-man procedure" :
http://forums.maxperformanceinc.com/...d.php?t=630943

Thanks for posting your build, it's inspiring.

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  #22  
Old 03-05-2021, 04:01 PM
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Round port heads were all equipped with free flowing Ram Air / High Output exhaust manifolds, measurably better flowing than common D-port log-style manifolds.

Impressive results nonetheless.

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  #23  
Old 03-05-2021, 04:49 PM
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That was done with stock RA manifolds. I did no porting on them.

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