[SS Tim]

Point is the 67-72 truck engines were not VIN stamped or referenced in any way from the factory. Only the engine assembly code.

You are correct that a lot of late 60's and early 70's CARS did have VIN codes stamped in the belllhousing area on rough as cast block surfaces. Fun when you see a coded Camaro block advertised without a VIN and there it is on the back of the engine.