Do not believe what one company will say about anothers products. They will say anything to get you to buy their products. As far as leveling you truck out go with what you can afford. Blocks are perfectly fine and tons of people use them safely every day. All shocks do is limit the travel by bottoming out on the down stroke, possibly prematurely wearing out. DO it right and get blocks and make sure they are installed properly, you will be very satisfied.