Just checked out the Dynacorn website (the company that manufactures reproduction 69 Camaro convertible bodies and supposedly soon-to-be Chevelle convertible bodies). In the discussions I've seen, there is mention that these new bodies would be assigned a state-issued VIN like any other "kit" car. What surprises me is that Dynacorn suggests that you can take a VIN from a donor car and put it on one of their bodies. Straight from their website:
I know we've beaten the "VIN-swapping" issue to death here lately, but this really floored me. Now whether its actually legal or not may be another story...A Vehicle or Vessel Identification Number (VIN) is issued by a manufacturer or State Licensing authority. There are three ways for a vehicle to obtain a number.
1) An existing VIN on a vehicle that is titled in your name can be transferred to a repair part (as instructed by your State authority).
2) A number may be issued by your State to ID a custom built vehicle when it passes a safety and number verification inspection.
3) A licensed manufacturer issued a VIN when the vehicle (or vessel) is made and ready for delivery. This can only be issued when a "turn key" (completed) car, truck, boat or aircraft has been manufactured.