Originally Posted by pieece
Why not air shocks? I know they are hard to find. Kind of the same setup as air ride...
Look into it, it might be a better route for you.
Easy way to go but not a good way to go. The shock mounts were never designed to support any vehicle weight, let alone additional bed weight or trailer weight. They are only for spring rebound and compression control (and some handling stuff too! ;-).
I'd go with some simple air bags or the Timbren setup as those both offer proper weight/loading distribution between frame and truck. In fact, they add additional points of contact to the axle-frame factory setup so it actually relieves some of the single point stresses found in the factory setup.