Pickups towing fivers ride and handle very well. Sometimes they have what I used to call a "giddy-up" ride (a fore-and-aft jerking). Now I hear the official term is "Chucking." Anyhow, can be fixed with a better pinbox and/or hitch.
The 4500... The tip about Henderson's Line Up is a good one. You can also call them and ask for John (Henderson) and he can tell you if there's a shop closer that's affiliated with their approaches, processes and parts choices.
Of late, Henderson seems to have begun favoring Koni FSD shocks. Bilstein is still a gold standard. Personally, I haven't seen enough reports on the FSD's yet. If I could wait I'd consider FSD, but if I had to do it now I'd go BIL.
MANY here have replaced their OEM shocks, right out of the box. Should't be, but a number have done it and been pleased. Track Bar will help if it's wandering, particularly if you tow. Sway Bars will reduce body roll. More important on the Fords because body roll affects steering, more on Ford than Chevy. Driving experience would improve, but literal "bouncing" shouldn't be affected much. If the bounce originates in one corner, sway bars cause it to be shared with the other corner. A Big Bounce on one side would become a lesser bounce on that end of the coach.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB