The only thing I worry about with the add-a-leaf is making the ride too harsh. I will not be doing any towing with it. I have a 99 2500 Dodge for that. I am leaning toward the shackles so it will still flex. I like the balljoint spacer idea. I am assuming that is so the angle is not thown off after cranking the torsion bars.

88 Raider- sitting on a full size Chevy frame with 35.5x11.50x16 Dyna Torque II tractors
89 Montero- stock 2.6 M/T 30-9.50 BFG all terrains on American Racing Wheels
99 2500 Ram- 285-75-16 Uniroyal all terrains,straight pipes with no cat (yes its loud)