Im gonna be installing my 4" lift this weekend. Also a 14bolt will be going in the rear. What degree of shim should I run?Should I run them in the front and rear? Ill be doing front springs and a rear shackle flip. Ive been told I maynot need to shim the rear, but I dont want to have to take it back apart to put a shim in later if I have vibrations. What if I decide on a 6" lift, then how much shim? Would 6 degrees work for both? Thanks.