a new set of diamond .030 over 12.1 318 to 288 cui pistons compression height is 2.00,they are balanced sbc pin size 500.00,moldex 2.96 stroke forged steel 8 bolt flange crank,std/std looks new,318 ,or 340 destroke to 305,cross drilled 650.00,performer rpm dual plane 340/360 intake,very nice...