A new set of springs would be the best way to raise the rear.
Blocks are the WORSE way, as stated above, axle wrap, long u-bolts, etc.
Shackles work but if too long instead of axle wrap you will need to watch side movement. HD Shackles with another spring reduce both of the lift methods and give you lift with side stability.
My Truck has 6" lift SkyJacker springs in the rear to replace all the blocks SuperLift wanted to use.
At first I had a major bump steer problem but found out it was the sway bar that was the culprit.
Without the rear swap bar the truck has no major bump steer, and the replacement springs are working a lot better.
4x4, 5sp, Std Cab, Stepside, E4 Red
4” Lift - Coil-Overs, 6” SkyJacker Leafs - No Blocks (Mistake)
31 Spline FX4 Rear Axle, 4.56s and OX Locker, Hurst Shifter w/Optional Stick and "Made by Grev" alignment adapter
Last edited by Scrambler82; 11-23-2013 at 02:40 AM.