I won't use lift blocks. The very first lift I ever put on a vehicle was on my 1994 Ford Bronco Eddie Bauer. I put on a 6" lift that had 6" coils for the front, but had a combination of add-a-leaf and 2" lift blocks in the rear. My Bronco drove awful on the road with the blocks back there. It was very bouncy and stiff. I upgraded from lift blocks within a month. I bought F350 shackle hangers and put them in the back of my Bronco upside down to achieve 4" of lift. It was an amazing ride difference. It was a lot of work since I had to drop the gas tank to do it, but it was well worth it.