I'm adding this for those it might help~ since the directions to install don't exactly tell you how to adjust.
Quoted from Don at chirco~
Quote:
This should be fairly straight forward.
Jack up the front end a put it on two jack stands, one on each side.
On your adjusters, the bottom screw and nut is the adjustment and the upper puts tension on your leaf springs.
If you tighten your adjustment screws, you will be rotating the springs up, forcing your control arms down and that raises the stance of the car.
Do this adjustment a little at a time to both your upper and lower beam tube, until you get the stance you want.
Then lock down the jam nuts so it stays in place.