I'm in the process of making a rear bumper and swing out spare tire carrier. The part that has me stuck is the hinge point of the spare tire carrier. What do I need as far as tubing and bearings to make it work? Oh its going on a fj40. And what latch assembly can I use? The bumper is 2"x4" box and the tire carrier will be made out of 2"x2" box. Pics would be a great help. Thanks in advance, Pete