Thank u for responding I was asked for more details.I found the original owner (welder) replaced front leaf hanger in the rear lowering trk 2 inches.removed stock overload spring put on fire stone airbag.I have 90 lbs in them it is like drivingba boat at 50 mph camper is a llft 6 inch says it weight is 3650 lbs I am going to pull a 4 horse trailer approx weight loaded 11k.I am going to return to stock hanger and add hellwig spring ditch air bags and put on rancho 9000 this is my plan as well as new tires.it is a dually and I was told it can handle the load