Posting this for a buddy of mine as he was asking what I thought. He has a '15 F350 CC,4x4, sb,6.7 srw, air bags and Lower Stable Loads and tows a 38' +/- TH. Truck weighs 8500 and TH at 15,500. Most ...
My thinking is to only put enough air in bags to make the truck leave with a load on it. If the back is higher you can get bounce. Some Rancho RS9000XL adjustable shocks may help also.