Quote:
Originally Posted by formula kid
The point I was making for D port heads the # 64 are the top performance head out of the factory. If you want high compression this is the top . That is the point I am trying to make. You do not have to shave the heads for high compression and the valve size is as big as Pontiac made in a production head. So if you want heads that are a lower cost you can buy a set of #13 1970 heads 2.11 intake 1.77 exhaust give you about 9.5 comp on a 455 because they are 400 heads and are available.
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Dude, #13 is 11:1 and up on a 455 man, give it up.
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