You will see real improvement with front POLY Bushings, since 1991 is the last year Ford used End Links on E-Series front sway bars until 2008. On our 1983 E350, there was no rear sway bar and we did not add one. I did add "repair leaves" to the rear spring packs because they were sagging so badly. But a "hard" end link rebuild kit (got mine from NAPA) made a BIG difference in the handling and tracking of the coach.
The "Old" E-Series with Sguared-Off Cab, Kingpin Front Axle and End Link Sway Bar, handles MUCH better than the "New" 1992 and later ones. Do those Sway Bar Mods and Additions. You'll be VERY pleased!
