The easiest way to raise the rear is either to just replace the leaf springs (or have them rearched) and/or add a shackle lift that should add about 1.75" lift in the rear. Either shackle lift or replacing the springs will restore stock height, doing both will yield a couple inches over stock.
Torsion Twist (TT) in the front should gain you 1.5-2", but don't go over 2" since it will give your CV joints in the front axle shafts undesirable angles to deal with.
I have a '99 (different front bumper than your '96 so you may have different experience with needing to trim the bumper) and I TTed it and added a shackle lift (Warrior 153) in the rear (still with saggy springs) and was able to fit 265/75R16s (32") on it by trimming the corner of the front bumper where it would rub when I turned.