FYI, what you are doing is illegal in most states. However, having said that pay close attention to the two photos in Brads link above. Use the proper attaching method and place the plate in the proper spot for your '47 title. Not that anyone at the Colorado DMV will have a clue where it goes anyway. You might be just unlucky enough to get that one old codger who knows his classic trucks and busts you for altering the VIN Plate. Good luck.