All ya need is somebody to pull you around like a rickshaw and you'll be set!
Seriously, I don't know jack squat about welding, but I dont see why you couldnt just weld in the back half of a "conventional" 1.5 or 2 ton truck onto that, hook up the drive shaft, and off you go.. provided you could get a title.
Ohh.. or make some kind of monster COE 'Burb out of it! That would be pretty sweet!
In my neck of the woods, the guys like to chop the back off the big trucks and make trailers out of them.
My local junk guy has several Ford, Studebaker, and Dodge big trucks that came in with a good dump bed.. he likes to chop the front end off and send it to the cruncher, then welds a gooseneck deal to the spot where the cab used to be, mounts a lawnmower engine to the hydrolics pump, and then he has a pretty nifty dump trailer he can use to pick up more junk.
He also has a nice collection of old truck rear axles.
