I had a friend and co-conspirator named Bill Banks (RIP) that owned a wrecking yard in Redmond, WA and after he sold his race car he built a Power Wagon for fun. Since he had the time and the resources he checked the dimensions of everything in the yard. He ended up with the complete drive train from a Chevrolet (gasp) 1 ton 4x4. It was way overkill bulletproof with a 400/727 combo. Both he and the Power Wagon are gone now, so I cannot ask specifics, but I know he never had to walk home due to driveline failure.