Looks like a Deuce and a half to me. I went the other way, once upon a time. Had the undercarriage from a Deuce (got blown up and burned during the making of the movie Megaforce) under an 53pax Bluebird school bus. Never got to finish it, and got orders overseas shortly after getting the rear end set up. My buddy who was helping me with it left my grandpa's 65 Econoline van shot up out in the desert instead of keeping it for me, so no telling what happened to the bus.

Bill