Bruce, open up the glove box, & on the back of the glove box lid should be a "GMC Parts Identification" tag, with all your trucks vital statistics on it, ie. eng. type, trans. type, wheels, brakes etc. Have you noticed it also has the small round park lights(not square, with grille surround encompassing them, like on 350 series , & smaller '54/'55 trucks), & larger fenders.
