Yea the springs can sag after a little while, good canidate for a spring over <img src="/forums/images/graemlins/kewl.gif" alt="" /> Your truck should have a D300 xfer case nice low gears. Watch out for oil leaking out of the draft tube when wheeling, it's common but carry extra oil just incase.
Nice truck, Have fun <img src="/forums/images/graemlins/cheers.gif" alt="" />