I would be using a Cherokee HP D30 to put in... 37's are going on...
To much tire. The balljoints will still die a grisly death on a regular basis and drive you crazy.
If you wheel hard even chromos with CTM's have a potential to fail regulaly.
Hubs will definately break on a regular basis.
Your ring and pinion may be subject to failure on a regular basis.
Even a fully pimped hp 30 is not up to the task of 37's. And, by the time you do all of this...................
Super 30, chomo shafts, and gears 2000$
Knuckles, crossover, hi steer, hubs, assist, 4000$
Trussing 200-500$
You are into a good aftermarket axle that can actually handle 37's and will not run you into the ground in maintenance and trail repairs.
Lastly, no stock wheelbase TJ should be on 37's. You will start to severly compromise your climbing stability for a small gain in clearence.
Rules of thumb regarding tire diamter and wheelbase
35" 93-99"
37" 102-105"
42" 106-110"
44" and up, 112" and up
The low end of those scales are what you can get away with and still have fair climbing stability. The highends are for those that climb a lot and want to maximize their stability.
Hope that helps.