Front blocks, this is not a post for them. They are a horrible idea. But, rear blocks are not a bad thing. They allow the use of a lesser lift spring, which allows more flex. Yes, a shackle flip is better, also not the point of this post. I run 2 inch blocks and will continue to. I have a friend that has a 600+ hp truck with 2 inch rear blocks,and 44 inch Boggers. Never a problem. Even competed in TTC with them. Just need to make sure the u-bolts stay tight. But, you should do that anyways. Just some ranting and raving. Ken H.