Ok 70 chevy 350 thats 40 over. Speed pro 618cp40 pistons with a .125 dome. edlebrock rpm performer alum headS 64 cc. edelbrock head gasket .38 thickness. Steel connect rods. Lunati cam 246 at 50 *. 515 lift. im going to check all my clearances tommrow but do you think my piston to valve and piston to head clearance will be ok and how should I check the clearances tell me in detail tools and the proceedure thanks