I took 4 leaves out of the bottom of my rear springs on my 46 1/2 ton and put them on top, sure it lowered it 1 in. but I put a set OF 15IN. radials on it and it rides alot smoother now,I do have to do something about the seat tho, its way too springy, kinda like a farm tractor,im thinking I might switch to a 3rd row mini van seat, to stop the bouncing,

http://i629.photobucket.com/albums/uu14/kurtdh519/002-1.jpg