good job was thinking about doing this myself, however i would have cut the roof off a little differently, i think that straight cut behind the door looks odd, maybe a 15-20 degree angle would look better? plus i'd lose the 'roof hump' and fabricate a new roof.
did it have a single rear door or two? if single you could cut it the same height as the roof and hinge it from the bottom and use the top half to weld behind the cabin? just some ideas i had of doing one myself