Ok after searching for an hour I havent answered my questions. 1. What is the spring rate of a stock 52" Blazer rear spring? 2. What late model Chev has the closest spring rate in a 63" or 64" spring? 3. What is the stock spring rate for the front springs? I ordered some 57" custom springs from a well known spring co and they made them 56". Well if I am going to move my hanger again I want to go longer not shorter. I figure I will just put the springs I have in front and get new ones (longer) for the rear. Those of you with the 52's in front, are they too soft? Perfect? Too stiff? I had these springs made somewhere in the middle of the Ferd 57's and the stock 52's. I want to say the stock 52 is like 22-2300#'s and the 57" Ferds are 1600#s Or better yet, I looked but couldnt figure out which company it was that listed all the spring rates for each truck, if you know what it is shoot it!