The shocks and coilovers in this kit are not compression or valving adjustable. The front coilovers are only ride height adjustable. However, all should work fine on your truck without revalving, given that the net difference in total vehicle curb weight between the standard and Payload Package trucks isn't too extreme. That being said, you may not see as dramatic as an improvement in ride quality or suspension performance over standard 6-lug trucks with the Fox kit.