Pick up a poly-eurethane sway bar bushing set. This will double the strength of the current sway bar. The sway bar prevents body roll. To help out the rear you can add a sway bar(cheapest), or a set of rancho or procomp traction bars, to tie the rear axle to the frame. Next pick up a set of the rancho or procomp adjustable shocks, so you can tune them to a more sportier ride. Putting on a wider tire/rim package will also help with the body roll.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed