I am currently rebuilding a 715. Engine was blown when i got it, so i decided to replace the whole drivetrain. Went with a 350/sm456/205. had bought a set of axles out of a mid eighties military blazer, dana 60 in the front, but the 14 bolt corprate was to narrow. I put in a 14 bolt semi floater out of a one ton van. Bolted right up. Converted the rear to disc brakes. TSM manufacturing driveline brake. Power brakes and a hydraulic clutch. and a hellof alot of welding on the cab. Does anyone know the length of the rear shocks? Im trying to figure out if I need to move the shock mounts.