squish is the piston to head clearence.... you have to run close tolereances here to help control detonation....

Bigblocks need more attension to detail than a small block...If not set up right they are more prone to hurt themselves

It's more important to match the cam and compression to the vehical you intend to put it in!

You do not want to put a 425hp stump pulling 454 and a dump truck to haul heavy loads especially in something heavy that spend a lot of time above 3500rpm.....you'll just be hurting you wallet as much as the parts you buy...