well, ive been searching for the past week, and i think ive made a decision. i want to add a BB to my 96 xj, but id like some opinions. my rear leafs are still ok and not sagging i think. from the center of my rim to the bottom of fender is ~17.5". now, if these are still ok, should i use an aal or shackle? i wont be towing anythingand it will be mildly offroaded. thanks for your opinions