spindles are definatly the way to go up front. there are alot of different factors on the rear that will affect the amount of drop you get from a flip such as how many leafs you have and how weak the springs are, i ended up moving my hangers down on the frame on my flip kit because it was to low but it was alot of work getting the old rivets out and making brackets to support the hangers, i havent seen anyone else do this but it is a great way to fine tune the rear flip