JMHO.....
Bounce up and down on any A body with no shocks and new springs to see what I mean.....if it doesn't bounce, you have a problem.
the SPRINGS are there to hold up the car .
The SHOCKS only function is to CONTROL the bounce......non adjustable (most factory) and single adjustable control both rebound/ compression at the same degree of stiffness, where double adjustable controls the degree of stiffness separately. Is the rebound / compression adjustable on your shocks?....if so, stiffen them up, otherwise, probably need the correct or better quality shocks.
