If you are planning on installing a 4" lift, you can save money by only purchasing a set of soft riding 4" lift springs for the front. Do a shackle flip to gain 4" in the rear. You will probably need steering correction, longer brake lines or drop brackets, and longer shocks. I would not buy a Kit because most kits come with crappy shocks and lift blocks for the rear. If you do the 4" spring front/shackle flip rear, you will have a real flexy Blazer!
<font color=red>Mudzer</font color=red>
1978/91 K5 Blazer