I know the VIN tag is supposed to be on the driver side door post between the two door hinges (a bit closer to the bottom hinge). My problem is that it's not there. It doesn't even have the rivet holes at all. Is there some other place that the VIN will be on the P/U? I know what the actual VIN is based on the registration, but I'm looking for someplace on the truck itself. I know that some of the earlier trucks only had the VIN tag and a serial # on the engine, but I'm not certain if the 1951 fits into this category. Would there be a stamp on the frame somewhere?