If your talking about making it into a swing away but want to keep the hitch empty your going to be going custom. We made a 20hp giant vac into a swing away about 9 years ago we still use it. It's mounted to the box wall but instead of a wooden 2x4 we have a steel 2x4 with large pipes we use for hinges welded to it. Then we have a heavy piece of angle iron welded to the back that gives the vac a seat to sit on when not swinging away. Then its got a bolt that keeps it in place. If you feel you can make something like that go for it but if your not comfortable with having a large chunk of iron hanging off the back of your truck held by welds you made go find a pro and have him design and build something for ya.