An old timers secret , 53 cc early heads and 30 thou valve spring shims , tweak your points spring tighter . 518 lift , 322 duration cam . 7800 rpm or close . Your welcome , and you will thank me later . Oh , and exhaust porting a must . You dont need all that high dollar garbage .

Thanks, I was thinking of doing Keith black .2 domed pistons with 54.5 cc heads from the 289, but was unsure if the compression would be too high, or if 11.5:1 would add too much stress on the stock rotating assembly.

The only reason I’m doing new pistons is because I need to rebore the block anyways