We’d look for a solid body and frame like this one. You’d want to have all the body parts with glass to make the rest of this build go a bit easier. Also look for all those vintage nuts, bolts, fittings, handles and bobbets. We’d get the frame sandblasted and repair any issues. Then we’d get to boxing and plating. This thing needs to be tough and ready to haul weight over rough terrain. We might even think of building our own frame or at least replacing sections of the original. Tying in rocker guards and a cage would help add strength to the whole rig.