Confused by the OP's terminology. Perhaps for clarifications. Trucks have the following primary identifications, only speaking for 1971ish, but most applies to 67-72. I'd think.
SPID, on the glove box lid. I think that's what the OP is referencing as a build sheet.
Build Sheet: If my education is tuned right, (Keith)
not all trucks came with a build sheet, depends on the factory. As mentioned above, they're usually found between the seat cushion and seat springs.
Protecto Plate (edited, thanks 67 Twins). That came with the original paperwork, such as the warranty and owners manual.
VIN Plate: That's on the LH door jam
LH door sticker.