the main thing people don't realize in super stock you cannot raise compression or change stroke mas a matter of fact when you put valve reliefs in the piston your compression is actually less for a 318 compression is in the 8.7 range stroke is + or - .015 you don't have a lot to work with every thing is set at factory specs so unlike most racing you cannot just bolt on a new set of heads or raise compression I will not give specifics on an open forum very proprietory information
