Ford 8.8 is a good choice, those things are stout. They can be found with gear ratios to match what you have, and with limited slip differentials. '95+ have disc brakes. I'm still searching for an XJ/MJ D44, so gotta go check another 2 junkyards.
http://www.firewalker4x4.org/tech/fo...talwriteup.pdf
http://www.off-road.com/jeep/tech/axle/Ford8.8/97.html
http://members.cox.net/rough-riders/...8/ford8_8.html
http://www.auburn.edu/~brewibm/Ford88.html