They are definately 64cc. The fastburn aluminum vortecs are 58cc. If you run a flattop piston with a .039 head gasket and a standard deck height, you get about 9.3 to 9.5. Standard deck height is about .020". My problem is my deck is .003, I'm at about 10.25.
I could use a 72c head, that would put me in the low 9 range.
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69 Chevy ProStreet, Low and wild.
78 Corvette
rturnpaugh@compcams.com
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