[Jonboy]

you can use the newer shells, but would need the newer guts too. The door shells are different 73-76 and 77-87. the main break as far as the cab is 81 and newer. The hood and wiper are 81-up, and they do have a little different dash pad and gauges. You could bolt the older fenders and hood up with little difficulty, but you have to cut the cowl for the 81-up hood hinges.