usct rear spring relocation kit
The trick and old instructions when installing the unequal spring pack is. After the springs are installed jack the car up on the center of the rear and level the front. When you let it down the car will lean to the left. Crank that bar up one turn for the street. And take it out for the drag strip.
I eventually went to Calvert mono leafs with caltracs. Car sat level at the same height as the old SS spring. For the other car we went with 1 inch lowering springs from calvert. I have every part number spring here to use . I like the calverts