I second the bilsteins, on my old 04 f250 I ran a procomp 4" lift with double mx6 shocks and full rear leaf packs, d range 315s @ 45psi and it rode much better than my current 04 with a Zone level kit Bilsteins and E range 35 x12.50 17 trail grapplers. Overloads and rear sway bar on a truck that is run empty really hurt the ride, as does excessive tire pressure on an empty truck, but short of an air ride conversion they will still ride like an old school leaf sprung truck.