I was wondering the same thing for my 71 GTX. My radiator support had been cut out and replaced at some point with a removable bolt in section from a different car. Was told original support was trashed when engine pulled and fell on it. I am trying to verify rest of body numbers but haven't found any. I've searched high and low and have even sanded down areas on cowl to find numbers but have come up with nothing. I found some really small part numbers stamped on cowl area but nothing resembling a partial vin???? Any place else to look?