ON the front heck NO!!! on the back theres better ways to go. Offroad can still cause lots of problems think of the stress the front end is in while plowing through the mud and rocks and stuff. Some owners dont have a choice in using blocks though. My 2004 Dodge 2500 6in suspension lift came with rear lift block and in 2004 was the only option for it. Now they make after market springs but not then and the new springs degrade towing abilitity. But my blocks are only 2 1/2- 3 in tall so not that bad. Hopefully folks will grow more common sense!