I run both, 2" poly spacer in the rear/ACOS up front with the Rubicon Unltd springs. I've also have a 1" body lift for that extra room for the 34" LTBs.
I have shocks for a 6" lift and use bump stop risers to stop the compression - 3" up front and 1" in the rear. You use the bump stops to protect the shocks from full compression and from the tires hitting body panels. Since the springs basically float both top and bottom (not secured), I secured the front using XJ coil retainers. Doing a 8.8 install in the rear, the brackets came with coil retainers. Just the tops float now, but I'll be correcting that soon enough.
In time, I've also installed Tera front and rear lower arms, RE track bars, Currie upper rear arms, and upper front arms similar to Tera design (Mako off ebay IIRC).
