ok the bottom end is a ls with stock bore with weisco pistons specs r between 12:7+ and 13:2+ for a gsr and i am using a ls block so i should be ariund wut comp and micro polished and balanced crank with acl bearings and for the head is a gsr head port and polished with omni power valves springs and retainers with buddy club spec 4 cams and aebs head studs and vitory z edelbrock mani with 64mm t/b and i still have to get some crazy headers but so far do u guys think good **** or should get diff stuff

 

why only 64mm...why not 68 or 74mm for the t/b.