Blowing a rear driveshaft on a stock Jeep is fairly common and can ruin your wheeling weekend. The slip-yoke design on most NP231 transfer cases means that once you remove the driveshaft slip yoke out ...
There's no shame in keeping the factory NP231 T-case that came in your YJ, TJ, or XJ. They're durable, lightweight, easy to work on, relatively compact, and are very well supported by the aftermarket.