Thanks for the link. When I enter the 72cc chamber KBs website says 11.5 to 1, the more accurate calculator says 12 to 1. I'm at 2120 feet above sea level. With the old heads and the same cam it was 10.47 to 1 using the calculator. I'm hoping the cam will lower the dynamic compression. I'll probably add some race gas when I go to the strip, I'm just hoping I don't have to run it all the time. Thanks for the help!

Last edited by Genuinejed; 02/19/10 09:14 AM.
1968 Plymouth road runner 1968 Dodge Coronet 500 64 D200 Good, Fast, Cheap. Pick Two.