Originally Posted by
primetime
Which pistons are being used though? you're right, when using the p72 head the C/R is going to be raised slightly depending on the piston and what that piston would normally yield.
no what i'm saying is that due to the deck height of the LS being lower the combustion chamber size is even lower in an LS, that is once you get rid of the massive chambers of the pr3 head.