A related question.
I have a 99 XJ I just lifted roughly 3 inches. In the rear I have the Chrysler 8.25, NV242 T-Case, and Auto Tranny. Nasty vibes even with 4 degree shims. I read on GoJeep's site that he used the output shaft from a Corvette (or something like this) and hack n' tap'd his T-case the same as RE.
http://go.jeep-xj.info/HowtoSYEconversion.htm
My question starts there, if I Hack and Tap my T-Case, could I use the above method combined with a stock front DS? I like the idea of having the same setup front and rear making them interchangeable if it ever becomes necessary.