When I bought my 2003 I thought the rear end sat way too high, so I removed the blocks under the rear springs and lost about 3 inches. The only thing I had to buy was new u bolts because I needed shorter ones after the change. It made the truck look level, but of course I don't haul anything heavy. I didn't change the front end and if you chage the rear end the same way I did you may not want to change the front.