You don't have to, but you may need to drop your transfer case a bit to keep your driveline angles in check. I ran a 3" suspension + 1" bodylift for a couple of years and dropped my TC 3/8" with washers. It wasn't all that noticeable and got rid of the vibrations for me. I know some folks that didn't have to drop it at all.
The kit you get from JKS will have a bracket for your linkage. I hated hearing it rub my tub and opted to replace it with a cable shifter. Other things that you may need to do would be to modify your console so you can shift into 2, 4, and R with a manual by moving it back or cutting the bezel. This is simple stuff compared to what needs to be done with a 3" body lift.