quite common, STD trim is the default cheap interior with painted exterior grill, etc, and special for the paint would be something that was ordered by a customer - I had a 57 panel that was 'special' on the color, and it was emergency yellow, ordered by a logging company for a camp ambulance, it had been repainted white but still had the yellow firewall ... look under where pieces bolt together to detective an original color, like the lap of the inner fenders on outers, under where the hood hinges are mounted on the firewall, etc, if it didn't have a real good quality repaint you'll find traces of the original color someplace
Bill
