to the forum! You will find that there are people on here who are extremely knowledgeable and willing to help. It's a family, and that's why it works.
But, your question has been answered. You are evidently young enough to be accustomed to having a VIN tag visible through the windshield. That is something that didn't happen until the early Seventies. Truck VIN tags are on the rear of the door opening of the '67-72's, but older trucks may have them at the top of the opening or on a kick panel. Until the windshield VIN tags were mandated, there was no cut-and-dried SOP to say where they would be found. Also, the rivets that hold 'em on, are special rosettes. The outer edge of each rivet should have a scallop.