I recently added a Roadmaster steering stabilizer to my 24' E450. I can't really tell that it made any difference. I started out by adding a stiffer front stabilizer bar and noticed little difference; however, my E-450 is rather light since I'm only 24' long. Last year I added a rear track bar and that made a world of difference in the amount that I get pushed around by wind, trucks, and my toad. If I had an E-350, I'd add a rear track bar and stabilizer bar. I might add a stiffer front stabilizer bar too. Early on, I added more caster as Harvard mentions and that helped some as well. The Roadmaster steering stabilizer has a return-to-center spring like the Safe-T-Plus; however, the spring is external on the Roadmaster unit.