The " Super Camper Special" was the one with the axle farther back and the spare tire in the side of the bed. I'm not sure of how many years these were made.
The "Camper special" was just beefed up suspensions , with or without side bed tool box.
My camper special with the moved axle was a 79. My father in law's was a 67. Both of our trucks had the spare in the side of the bed, in a tool box
I know mine was the last year, they came out with the dually in 80.