I put the Mopar springs on my Challenger and they sit a little low for my taste so I had to raise it a little.
When you put your springs on did you put all the weight back on the springs before you tightened the axle U bolts? it will make a little difference. On my AMX's the ESPO springs settled about 1/2", so I wouldn't count on much more than that. what I did with them was make about a 3/4" lowering block by taking the right size peice of metal , drilling a hole all the way through, then welding a bolt in the hole leaving room for the tie bolt at the top and enough sticking out the bottom to replace the tie bolt in the spring pad. then if the springs ever sags enough you can just remove it.
That's a good idea AMXguy. I installed pinion angle wedges on mine recently and noticed it lowered the rear.
