I'm trying to get 8" of suspension lift and I already have a 4" shackle flip in the rear. I just got off the phone with St. Louis spring and they quoted me $130/spring, which sounds pretty good. However, he told me he can't be exactly sure how much lift his springs will give me. For the front spring, he can arch a spring 8" over stock but it could be 8" +/-. I wanted to go with a custom spring because of the extra weight from the big block up front; he (Jim) suggested a 5 or 6 leaf spring. I'm just looking for some input here. Does anyone know what I should tell him so I can be assured an 8" lift spring? The same problem exists for the 4" rear spring. The price seems right, but would it be more cost effective to go with a kit? Also, how do I go about getting one of the top plates for the passenger side front spring for a D60? Thanks. 1970 GMC Jimmy 502HO/SM465/NP205 doesn't run just yet!