since we're harping on ZJs, and Kev doesn't think a ZJ on a BB is capable
...........
ZJs suck in stock form. they have garbage rear axles, garbage AWD transfer cases, and garbage CV joints in the front axle and on the driveshaft. they have problematic transmissions that don't have a breather at the top, so they CAN take on water (and blow the tranny apart)
the D44a is marginally better. but more costly. not worth swapping.....
swap a better axle in the rear (8.8 or 9") np 231 tcase and ujoint axles/ds and you have a starting point similar to a TJ.
then your lookin big bucks for a decent lift (not rough country) just to run 33s.
TJ does that with a BB........ but doesn't have a V8
nor the ability to hold groceries.