It involves moving the motor mounts, you will need an AX-15 trans and the transfer case primary shaft will need to be changed.
The wire harness is different also. Is it carved or MPFI?? More issues to deal with.
It is a lot if work but folks do it all the time.
Fund the search box on the YJ page 1/3 way down header right side. There is a ton of threads out there.
Sent from underneath my Jeep
89YJ 2.5L TBI, AX-5, NP231 SYE, Tom Woods Shaft, 33" BFG T/As, 4" lift.
AF Jeep Club Tail #184