To run 32x11.50 tires, you only need aftermarket wheels with less backspacing & a 1" to 2" suspension lift or 1" body lift.
The factory wheels have too much backspacing (5.25" to 5.5") which means they position a tire that is wider than 10.5" so close to the springs in the rear that the inside sidewall could rub on the spring perch. Nearly any aftermarket wheel will have less backspacing which would allow a 32x11.50 tire to be mounted. Wheels with 3.75" to 4.5" of backspacing (which is not the same as 'offset') will do it.
With a 2" suspension lift, you may or may not need a small amount of t-case skidplate drop. 1/2" or 5/8" worth of spacers between the frame & t-case skidplate should be enough to eliminate any vibes a 2" suspension lift might (or might not) cause.