Pinion angle with 2\" shackle flip? I'm "rebuilding" my K5 and getting it back to the street(and mud) really soon and I want to go with 4" front springs and am still deciding out back. The rear leaves I have right now are real rough riding but great load capacity and give me like 2" of lift. So I need another 2 to match the front. With a 2" Shackle flip from ORD how would my pinion angle be? perfect for 4" lift or would I need to shim it one way or the other yet? Its either this or I may spring for well new springs out back and get a better riding K5.