I have no idea what parts he is trying to save, a 8v71 with 150,000 miles with a V730 you are lucky to get 1000 bucks ,there is not much demand for a generator with the old Perkins diesel, with the hauling dismantling and paying $3500 for the bus. I personally don't see the advantage plus his new bus is a different model and not much is going to benefit him in the way of parts I know the engine cradle is different so that shoots down the easy engine swap BTDT and the 4108 he has now is 24v so the starter and alternator are not much good to him except for resale