If you want extreme articulation go with a Pro X No limits lift kit and I'd recommend usijg their shocks as they are tuned for the muli rate springs they make. I have the 3" ProX No Limits for a Rubicon and their shocks and it works and ride very well.
As the post er above said " call them "...
Look at Rock Krawler Pro X No- Limits. It triangulation the 2 top rear bars and eliminates the rear track bar for better articulation.
I have it on my JT with 40s and hit 40" on the ramp, I stuffed the front tires due to the bump stops not adjusted fo the 40s and the rear tires were still on...
I had 40's Patagonias and not a single one was round. Two were out of round by 3/16", one was out 1/8" and the other out by 1/16".......made the truck ride like crap. Bought some Pro comp xtreme MTII and it rides like a dream now.