I have a front adjustable trackbar and Adjustable LCA's with my RK 2.5" lift and a rear bracket used with the stock track bar, so no adjustable bar in the back and I don't seem to have an issue. Of course you can get adjustable upper and lower control arms front and back as well as a adjustable track bar for the back. But, you don't "need" them. Hey.. They say you can't take it with you anyway. One day, I hope to add UCA's to the front and LCA and UCA's to the back along with the adjustable track bar. but that is down the road some as it's sort of a "if it ain't broke.. don't fix it" thing I got going on my lift.
Man, wish I had the time to wonder your way this weekend to help with your lift install. As they are fun to do.