Search this forum for the method to cure the skin crack at the vent window frame. It entails welding an angle iron reinforcement to the underside of the lip by the vent window frame. Since you are already welding the upper door window frame, you should find it pretty easy to reinforce the shell and save any more cracking door skins.
Good Luck, L.M.
1987 YJ-4.2L-Standard Shift- Re-manufactured Carter Carb-2" body Lift-31X10.5X15 BFG KOs-190K Miles
HEI distributor with computer and all related relays and wiring removed.
No back seat.
12K Badlands winch with dual batteries.