If your wind up your torsion bar too much, the ride would become very stiff and there is a large risk of damaging your suspension. Your camber, as you have already noticed, would be affected and this would result to an uneven tire wear.
Since your pick up has an IFS, the best way to increase the lift would be to install a ball joint spacer. A 1/4" thick spacer would result to a1" lift. If you want a 2" lift, install a 1/2 inch spacer.
199 Offroad House can do this for you at a very reasonable price.
