Well I posted this before but my subscribed threads were deleted when the board changed so I have to ask again. I currently have a 4" blocks(tapered) and a 10 bolt and am ready to swap out to a 14sf now. The P.O. of the 14sf had the spring perches reangled because he didnt want to use shims. What is the 1)best 2)cheapest way of getting the 14sf under my Blazer and keeping drveline angles where they should be.