I like my superlift 2.5'' leveling kit. It has 5 leaves for the diesel engine weight and rides great. I put 3'' blocks in rear but it almost isn't enough, so I will be putting in blocks from a f350(3.75'' I think I recall). Lift kit came from 4wheelparts. You can go to superlifts website too. Any place that installs lift kits might have f350 blocks discarded from lifted trucks that they might just give you.