When modifying your Jeep, always consider what things will go wrong and the availability of spares, whether stock or aftermarket.
There has been a lot of talk about axle shafts which is a considerable weak link in the Jeeps Wranglers, same as the AMC 20 2-pce shafts in CJs. But their limits usually are consistent with weight, tire size, and hp.
One thing that hasn't been discussed is the output shaft of the 231 and/or rear ds. The rear output of the 231 is a slip yoke design and the rear ds is a single piece. Consider you go larger tires, regear the axles, and lock them, maybe add new brakes, add lift for larger tires, etc, and didn't consider the rear ds and joints. That's probably the next archilles in the system. When the rear ds has to come out, you don't have a way of sealing the output shaft of the 231 due to the design of the output shaft. Slip Yoke Eliminators (SYE) kits fix that, but require a new rear ds. Cost is upwards of $400. Keeping someone's old rear ds as a spare could work, but only if you damage the rear ds. Consider a SYE and new rear ds. But also consider different pinion yokes. You'll prefer 'u' bolts over the straps. There is less deflection in the u-bolts and replacement is easier. Straps use a bolt that threads into the yoke. Breaking that and you could possibly not be able to get it out of the yoke. U-bolts are secured with a nut and are separate from the yoke.
Just someplace else to think and plan about.
