Mounts, block, crank, rods, oil pans, dipstick(post 64) , oil pan. even use the same factory 2 barrel. The water pumps interchange, the power steering pumps and compressor do as well. But for some dumb reason, the alternator bracket is the odd ball, it is the one part of the acc drive system that doesn't interchange and i think its because the poly's head being wider.
