Judging by some of the other photos you've posted of the suspension, I'd suggest removing the entire air bag system and starting over with properly fabricated mounting brackets. The stress on those mounting points on even a moderately rough road is incredible, and there's a multiplier effect as the speed increases- - - -basically, as speed doubles, the load squares. 10 pounds of force at 20 MPH becomes 100 at 40 MPH, etc. One of the rules of thumb we used while dirt track racing went "Build it twice as strong as you think it needs to be, and don't be too surprised if it breaks!"
Jerry
