My turck is a 1976 k5 blazer. 1. I went to summit today to purchase some leaf spring bushings, I thought it would be a pretty simple purchse but then the counter guy asked me if my leaf spring were stock or after market, I didnt have a answer. I bought my truck with a suspention lift already installed on it. How do I figure out if my springs are stock or not? 2. I would like to buy Energy, what color do you suggest I get? I was thinking black so they wont show as much wear as say red, right? 3. I see an option on summits website to buy sleeves for leaf springs. Should I think about buying and installing these as well if im already going to be replacing the bushings? 4. If I do have stock leaf springs, can you guys give me the correct Energy part # for the leaf spring bushings ill need. I want to do all four leaf springs.