My buddy has a 91 GT and he wants to get a set of springs. The question is, what is the diff between specific rate and progressive rate in terms of ride quality and handling. The priciple is easy...progressive just means that the spring becomes harder and harder to compress throughout its travel, and specific rate just means that the compression rate is the same throughout the entire travel of the spring. So which is better for normal street driving, maybe a couple weekends at the track? Any help would be great thanx!! Five-0 FO' SHO'