Check with the drag racing shops. A long time ago, when DC4WD by Roanoke was still in business, he had a guy who would come up from NC and set gears and lockers. (Never got his name, but he did my 4.56 and lunchbox on an XJ when I lived up that way). Those guys are always working inside pumpkins.
Better yet, search up "NOVA Jeepers" and hit up their forum. Lots of good people in that bunch and they'll know.