I too have the Air Lift bags with B&W. I had to modify the upper mount also. I cut a notch out of it and welded a piece of angle iron on the bottom side to reconnect the two sides, which formed a "V". This allowed me to gain some height. The front rail of the hitch sits down in the "V". It would probably work best if I took the overloads off as I have minimal room for the bags when the truck is level but I have run hundreds of thousands of miles this way transporting RVs so it works. I was able to bolt them in place and of course drill was required.