Just my theory here, but I would say that it was a standard M151A1 that was demilled by cutting it in half and then when they went to put it back together they lengthened it and built the upper body on the rear to make a "pick up" jeep. That's my thought on it.
Exactly what I said.I got a theory, the jeep was probably a cut and reweld but instead of rewelding it back into a jeep, he chose to make it a (pickup?) The guy probably kept the suspension and had a shop create a new back. Either way it will stand out at MV rallys.