depends too on which leaf spring front coil spring combination you are running also.
the reason why I want sell a normal hemi spring that mcguahy, belltech, or any of the other lowering kit guys do, they are the wrong rate of spring , way too soft, thus you end up having to max out an adjustable shock, or it overworks the oem shock
suspensionn is a combination of everything together, if you are going to the road course its totally different from a set up of a drag car, and between the two of them you comprimise reg road drivability, its all a trade off, but the support components must work in conjunction with each other, the shocks, springs, bags, whatever your running