i want to go with a solid rate rear spring. the only information that i can find is a 5" diameter spring and the factory rate is 110lbs/in. i would like stiffer springs, maybe 125 or 150lb/in but if i go that route, i'll have to get a shorter spring...right? so how long should it be? i would like to keep it near factory hight without going any higher at all. i can deal with a half inch lower or so because i have hal's 325lb springs in the front with hals on all four corners. so the question is, what diameter and length should i get in either and what spring rate to match the 325lb fronts?

thanks for your help.

 

i posted on ls1tech as well, and found that i'll be running a 5" by 10" spring at a 150lb rate. that will get me at 26" fenderwell height with isolator installed.