I don't know what a C body front clip measures at the front K frame mounting points, but a Dodge pickup frame is 38-1/2 inches wide across the rails. I would be looking at the possibility of the front of a Cummins D250 frame section with suspension at this kind of weight and some 16 inch eight lug wheels with the Dodge hubcaps, front and rear, and a Dana 61 with 3.08 or the like gears.