Originally Posted by bowler

my car is 2470# runs low 9.30's @ 145 with AFR 227 heads that were milled to 57cc had to use a .062 copper gasket and compression was 14.9 to 1 i want to lower the compression to 14 to 1 with a .041 gasket and 66cc chamber, 4.56 gears, 32" tire, 1.76 powerglide, my engine is a SHP block deck is 9.005, 6" rod my current roller cam is a Bullet part #501000 (.660x.647 and @.50 is 278x286) looking at AFR 235 (i would try their 245 but my shaft rockers won't fit) or Chad Speier RHS 245 or ?. i'am not trying to go as fast as possible but do not want to go any slower, i'am open to a cam change if that would help. sure would appreciate your help. thanks Doug