I've built two Deuce dumps, one with a 5-ton dump body and the other with a commercial hoist frame and the stock M35 body. Both were PTO driven, I think that's the way to go if you really use the dump more than to haul firewood twice a year and the 5-ton body is tough if you haul rock or rough materials...
The 5-ton bed required moving the pump over to the left side with thick steel plates to hang it with & run hoses to/from the stock location. These plates were fabbed from mild steel and bolt to the pump and original base with a thin gasket, no problems so far. I used the rare 'front and back' Deuce PTO to drive this setup as I have a winch on this truck as well.
The commercial dump hoist frame worked well enough but it got complicated in the PTO department. I used a sprocket on the regular front output PTO to chain drive a jack-shaft that then drove the shaft going back to the pump, so two sprockets, chain, two pillow-block bearings, jack-shaft and then a pto shaft w/ two u-joints, whew! If I were to do it again I think I'd mount the pump in front of the PTO and just use longer hoses. The problem I had was if the pto was accidentally put in 'high' it tended to throw the chain and the whole thing was vulnerable when off road...
Deuce dumps are great where you need to tread lightly, bad woods roads, stream crossings, etc., places where a big truck will just sink and/or leave a huge mess. It beats the hell outa 5 yard single axle dumps for offroad!!!