Matt suggested to go with a longer shock than the lift was for, I suppose with intentions the rear would be lifted higher at some point. I was running 4" lift shocks on the OME HD so I had enough flex without a sway bar in the rear my spring would almost fall out! I suppose a 6" shock would be good but guess it wouldnt hurt to get some extra flex out of a longer one, are you going to be running a sway bar in rear???