On 2002 E450, I still have Original Rear Shocks at 40,000. Probably shouldn't but it's a project I just haven't gotten to.
I installed Hellwig Sway Bars Front and Rear. Huge difference in stability, tracking, cornering. Our coach is actually 32-ft (called 31A) and there's at least 10-feet from rear axle to trailer hitch. I got a BlueOx Track Bar and installing it helped a lot with the toad.
The Hellwig 7008 Front Bar, 1-3/8", WILL FIT your late model axle. From 1992-2007 (Chassis Years) Ford used a Front Bar that didn't have End Links. Instead, it poked into bushings in the axles themselves. In 2008, they added mounting bosses to the axles to allow use of traditional end links. In proof, I offer a photo. I replaced the axle of our 2002 chassis with one taken off of a 2012 chassis being retrofitted to 4WD. The machined surface with rust is where the late model (2008 and newer) Sway Bar End Links would attach. Next to it is the hole that would have the rubber bushing for a 1992-2007 Sway Bar. Ford added the bosses but didn't fill the hole. Then further to the right is the end link clamp used on the Hellwig 7008 bar that I previously had on the 2002 axle.
Several of us have ordered Hellwig bars from
SD Truck Springs. I found them very satisfactory.