Sorry to say, but most of the electrical parts on that thing do you no good. Even the cluster. Your MJ is a renix with a manual cable... In '91, it went electronic, so it wouldn't work without some expensive adapters. You are much better off just finding a renix cluster. Doors, if you need them would work, rear axle is better than yours in the strength dept, seats if its a 2 door, or 4 door without the tilt, cooling system you need the thermostat housing, radiator, cooling hoses, reservoir, and I think a couple other little things... Interior stuff if you need it...
Rob L.