Longer brake lines/brackets , lines are preffered. I recommend a steering box brace. Even with steering arm the draglink get adjusted, it WILL be off. Depending on how you lift the rear , you may need shims or a CV shaft to keep vibrations at bay. Typically 4 inches would pose no problems on driveshaft with blocks or springs and the proper shim. A shackle flip will point your rearend up higher on pinion end. You have a pickup , right? Those shafts are longer and work better lifted than Blazers shorter shaft . Let us see it when its done /forums/images/graemlins/thumb.gif