If you do the 4cyl with the aw4. I think none of the axles you have would be a good combo, considering (I believe) that the factory ratio for 4cyl/auto would be 4.56.
i have seen a couple of XJs with that combo & ratio.
so that leaves the option of 4.0L drivetrain with 4.10 gears if you plan on running 31’s
if you plan on keeping stock tires, but plan on hauling a lot of loads... do 3.73’s
otherwise do the 4 cyl with ax5 & 4.10