I am trying to figure out which cylinder heads to buy for my 76 Chevy Nova. The Nova came stock with a 8.5:1 compression rate which I would like to increase. I am not trying to create a drag car but I really would like to be able to burn some rubber What compression rate would you recommend I should aim at without changing pistons?

Bore = 9.489 cm
Stroke = 8.849 cm
Current C.R = 8.5:1

From these specs I calculated that my current cylinder heads would have a 83.5 cm2 combustion chamber. Does this sound big? I used the following method to calculate my heads combustion chamber.

http://www.e30m3performance.com/myth...comp_ratio.htm

I have been browsing summit for suitable heads and so far the 72 cc heads looks good. This would (i think) give a 9.7 compression rate. Should aim at a lower compression?

Regards Jonas