* Just to get a rough idea, unbolt the bottom of the shocks, jack up the rear of the car and support the weight on jack stands under the frame rails - letting the rear suspension hang. Then see how far the shocks extend and their relationship to where the shock studs are hanging.

* The lowering blocks may be upsetting how the SS suspension is suppose to work.

* Which shocks do you have. The Mopar auto drag shocks are the softest. The Comp. Eng. are stiffer and Ranchos can be adjusted pretty stiff. Never tried the others.

* Somebody still makes shock extensions for mopars if the shocks are too short. But the lowering blocks basically shorten the shock installed height. See how far they compress from the installed ride height - with the weight/wheels still on the ground.