Really only a couple of suggestions, the first one being that I think the AFCO 20231HD's will be too stiff for a handling car, and will have too much arch (6 5/8"), which will put the *** end up in the air and upset your roll center. Those springs have a rate at 166 lb/in, which is super high. I run AFCO's on my Duster as well, the now discontinued 20231M's. They're 121 lb/in and have the 5 5/8" arch.
