I added a rear sway-bar last month. I'm using a 0.9" 50" Currie bar with true 20" length arms (I say true because Currie's 20" arms are actually only 18" long hole-to-hole, so I extended them to fit my setup). Since I can't get much up-travel in the arms and they point down at ride height, I tilted the link way back so that it unwinds during droop keeping relatively good geometry throughout travel despite a fairly non-conventional setup. Conveniently, my caliper guards were perfect mounting points for the new sway bar link positions.
(And, now I have another gas cylinder sitting on the floor in pictures, how embarrassing... this time it's suspension nitrogen, haven't done a safe setup for that one yet as I don't use it much).
Sitting roughly mid-stroke it looks like this:
Then at the travel extremes it becomes this:
Since I now have a sway bar, I dropped my ORI lower pressures from 180PSI front and rear to 120PSI front/70PSI rear to reduce the spring rate (down to about 100 lb/in at ride height). This had a major improvement for rough forest roads, washboards, etc. but unfortunately had almost no impact at the dunes which surprised me.
The rear sway bar also really balances out the suspension rock crawling as I never quite liked having equal front and rear articulation stiffness, doesn't behave well on up-hill climbs as the rear just flops. This balances it out much better on climbs.
I also made a recessed winch plate cutting off about 5" from my front bumper approach clearance. Still need to add tow points and figure out where to put my license plate (apparently a local town just started aggressively ticketing). Also not sure if I'm going to leave the winch contactor box out front like that, but honestly it's probably not a big problem as long as I don't go crashing straight into perfectly vertical brick walls.
Also flipped the bolts on my Hutchinsons, I quite like it! Highly recommend doing this if you run this type of wheel. I assemble it with a few studs to get it centered, then pop them all out and replace them with backwards 1/2" bolts.