I wanted a military style rotating hitch for my FJ40. This hitch is off of a 1954 Dodge M37 3/4 ton Weapons Carrier (basically a tactical 4x4 pickup, the HUMVEE of its day).
The hitch itself is simple. There are only six parts - two small parts are a large cotter pin (not shown) and a zerk grease fitting. These three photos show it cleaned up assembled and disasembled.