well put xk
once you disconnect your sway bar your axle will have a greater range of motion, it is critical that you test this out first to make sure you aren't rubbing your tires on the body anywhere.
i found an old loading dock to check my flex and clearnce when i changed from 33" to 35" tires...
the front was ok since i have tube fenders the rubbing didn't matter
but in the rear it was going to ruin my tires
i trimmed the armor plating to give the necessary clearance, but for a nice rig i would suggest limiting the uptravel with an extended bump stop up top.