Vin Tag

Jerry aside from what 67dart said do you have the build/broadcast sheet? if so both the VON/SO Number (on core support, left rear quarter panel and fender tag) are on it as well as the VIN number. It might be easier than having a battle with unarmed people at the DMV.
You might want to try here also http://earlycuda.org/
also http://maxwedge.com/articles/broadcast.php