I had a 68 four door 3/4 ton that was built to be used as an airport freight loading/unloading truck. There was a conveyor belt set up on it that was mounted on the front bumper and rear utility bumper. The high end was at the front and could be raised or lowered. This was removed when I bought it. It had extremely low gearing, probably so it could creep up to the side of a plane, and had never been registered since it never left the airport. As stated by others it had to be custom built (good job) because the rear doors also had vent windows. We registered it, stuck an old Borg-Warner OD trans in it and pulled our race car trailer with it for 4 or 5 years trouble free.
