I don't know what the lug pattern on an M101 is, but I'd switch the lug pattern on your XJ. 5 on 4.5" is a passenger car lug pattern, and makes it so you can't use any decent locking hubs. 5 on 5.5" (standard OLD Jeep) would be much better. Personally though, I'd go 6 on 5.5" (Toyota/Chevy). Just saying, if you're going to change one...
I installed one of those kits too, but I don't think I'd spend the money again even if they were still making them. Nice parts for sure, but I don't know why I didn't just swap axles back then, since I ended up doing it later anyway.
im NOT trying to change the lug pattern on the jeep. I want to change the lug pattern on the TRAILERto match the jeep lug pattern. Hope this clears the air, I guess i wasnt specific enough.