Towing expereinces with F-250

I had a '03 F250 cc, sb, 6.0, 4x4 and towed rig in sig. Truck was ordered w/camper & tow pkg so it had the aux springs. Add ons were: 50 gal Transferflow tank (IPO factory tank), Timbrens, Banks Monster exhaust and FICM was beefed up some after it went south. Was over all the way around, but truck did just fine w/ 5er. Would've liked to have kept it, but other issues started to crop up which meant it wasn't feasible to keep. '03's had just 8800 GVW and 20,000 combo weight. New 5ers don't seem to be getting lighter thus forcing us RVers to get duallies or at least 1 ton SRW trucks.