I assure you that the VIN numbers will match. I had the engine rebuilt in 1988 by a shop near Panama City. It still runs great but it is dripping oil from an elusive source on the back side of the engine (and not the oil pressure sensor). Oil runs down the right side exhaust manifold. I figure that I may as well have a rebuild after 36 years while the engine is out for gaskets. I probably have 60K or 70K miles on the rebuilt engine.