That’s not quite true that the only way to prove that the VIN belongs to the car is through the broadcast sheet. In the case of the earlier cars the IBM card can be sourced thru FCA Historical (or what ever they’re calling themselves now). It will list both the SO number and the VIN number the same as what’s listed on the broadcast sheet.
Maybe I miss worded it but the SO number is part of the body stamping (at least in 67) and on both the data tag and broadcast sheet. Is that the case in 64/65? I don't know.
