I'm looking for the proper vin number of the truck, trucks real info is stamped near the drivers door and there's a vin number for an 85 gmc Sierra 1500 in the glove box and wanted to know if there's another stamped somewhere else, or which one I need to have it registered

 

This site should help you with your VIN number:

https://www.youcanic.com/guide/chevrolet-vin-location

 

your 78 C 10 has a 85 VIN in glovebox ? and the Vin is the number , Vehicle Identification number . So just say VIN , unless you want to say vehicle identification number number its your choice