I have been reading everything that you men & women have writen , and have a question ?? Is there a difference in spring rates if you run a posi or runnig a welded unit or open diff. The way i figure you would have to run heigher rates in the rear so when using a posi or welded to stop the push in the corners and higher in the front with open diff (kind of like SS) Also some are saying custom Koni`s, where can a person get these for 87-90 EGT ? Because all i see now are Spax which are very good but have to run custom sleeves to fit in steering knuckle!(is it safe)?? Still thinking of car to run and i keep coming back to ford (ran a V8 stang for years in EMRA)but would like to try FWD Thanks for your help