1998 Ford E450 Super Duty Triton V10- opinions?!

Fuel Filter is a $10-15 part, you need a tool that's a few dollars to disconnect it from the fuel lines roughly under the driver seat down on the inside of the chassis rail.

By "stabilzer" do they mean a scissors jack-like thing to keep the coach from swaying parked on a campsite? Or a "stabilizer bar" "sway bar" or "anti-sway bar/"E-SuperDuty/E450 has Front and Rear Sway Bars. A bushing could have failed, or a bracket come loose. Same with a shock absorber, even a rear spring bushing or shackle.