Overload shocks on a Duster?

My front suspension has been done for a while and its time to clean up the rear end. I am putting in the energy suspension poly bushings and replacing the shocks to see how I like it before I consider things like panhards or watts links. I have the PST bars up front so was thinking about stiffer springs in the back in some manner. While looking at shocks I came across these from monroe :
58496 :: e-Catalog :: MONROE® SHOCKS & STRUTS
Instead of being an air-leveling shock they are a shock and lightweight coil-over unit.
Has anyone run these or something like them on their cars?
They seem like they could be a nice way to freshen up some old springs, or they could be a great way to ruin the handling of a good car.
What are your thoughts?
Jerame
In my opinion the only way to go is to replace the leaf springs with new ones. Anything other than that is sub standard. Handling , traction , ride and safety will be compromised . Spend the money and get the springs (i purchased mine from mother mopar with extra arc ) you will not be sorry.