There is a spacer kit for the cherokee to lower the transmission some. But getting the angle of the rear pinion 2 degrees less than the output of the trans is the best set up. You should not need to do a SYE with a Cherokee cause the drive shaft is way longer than a TJ. And I had at least 5 jeeps with 4 inch lift with no issues as long as the pinon angles are set right..
I am a Jeep nut and just got a 4runner to mess with.