Hy Jim Sears and guys, the engine code on a Chevrolet V8 engine is stamped into the block in front of the right cylinder head, the block casting number is at the rear of the block above the bellhousing mounting surface. The casting number can identify many different engines, for example 3970010 could be a post 1968 302, 327, or 350 as all those engines use a four inch bore, hope that helps.
