First time Post: My A has used the engine number as the VIN. If I change engines what happens to the VIN?
YES, Henry, every state has different sized "HOOPS" to jump through, if you're "FAT", you might not make itIn Georgia you have to fill a form with the Vin Number and you take it to the local DMV to make the change effective. But like stated above, every state is different.
I would use a temporary engine while I rebuild the original engine to reinstall.
If the original block is total junk, then the new block would get the same number as the junk block.
I have saved my original junk block just in case anybody ever questions the provenance of the number. It works well as a doorstop for the barn and it is unlikely to be stolen.