If you want to reduce the body roll, shocks aren't the answer. While a super stiff shock will reduce body roll it will also have a negative effect on ride quality. I would replace the front swaybar bushings with some polyurtethane, should cost less than $20. I would then add a swaybar to the rear(if one is already in place then replace those bushings w/polyurethane). The polyurethane bushings will basically double the size of the front swaybar(its effect).

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