I installed Air Lift air bags on 2 previous Chevy trucks. Never any problems with either set. One on a 3/4 ton and the next on a 1 ton. Since I have over 20 years experience with trucks, trailers and construction equipment and not wanting to offend you with legal info, which I appreciate your attitude about that, the next thing I would be looking for is your rear axle load capacity. You can add all of the leaf springs, sway controls and what not to that truck but if the axle is over loaded you will start having bearing issues, ring and pinion issues, frame issues etc.
I'm just saying!
Good luck
