Original Pull-Rite hitch - I'm stumped on what to do with it

The "88 Sub I inherited has a pulrite. I enjoy being able to turn without fear of the trailer contacting the truck (which was a problem) and being able to drop the tailgate without hitting the trailer jack. The hitch came with a clamp to secure the tow bar from swinging for towing light trailers. Pulrite used to maintain a directory of used hitches for sale.