My Dad had one I don't remember the year. About 75, not long after I got out of the Navy, he bought a used used Ford 6 out of a Bronco, 170? 200? and we put that in. Used part of an old oil pad to clearance the firewall. "The person formerly known as my sister" burned it down, just before I came home. Dad had 2x 6V batteries in series, one up in the engine room, and one under the seat. The seat shorted the battery. We found another cab in a junk yard, made a stab at fixing the floor, and fixed it up. So far as I know, one of the neighbors "around the loop" from where Dad and Mom lived still has it. Dad had added a overdrive, and a hydro-vac booster. Even so, it was not a "highway rig" it was originally a 4 and 488 or 5 something axles