The truck belonged to my late Grandfather. He bought it new (still have the invoice) and used it primarily for hunting/fishing trips; or to take the trash to the landfill....
We just sold the slide in camper that was on the truck since 1974. I know the truck has an extra fuel tank and coil over shock in the rear (likely to support the large camper). Additionally, my grandfather had them extend the rear bumper by the frame rails to support the trailer as well.
I don't have any pictures of the tailgate, but It's been in storage since the early 70's.
To get it ready for sale, we put 4 new tires, oil and coolant change as well as a new battery. She starts right up every time. I've only cleaned the front glass - so she looks dirty.