I recently bought a 4 inch lift kit and it comes with blocks for the back. I know, I know I should have got bigger leafs but I just can't afford it at the minute. So anyway, my bronco already has small blocks in the back(not sure if these are stock or not)? So my question is do I remove the smaller blocks and put in the blocks that came with the kit or do I put the blocks from the kit on top of the smaller blocks? I originally thought you take out the old and put in the new but I was reading a thread where the guy put in 4 inch leafs and removed the original 4 inch rear blocks and in the pic of what he took off it was the 4 inch blocks as well as the small blocks (His rear end looked higher than the front though). What do I do?