so I just installed the readylift 3.5 sst with 5" rear block kit in my 15 f250 6.2 and now the rear is sitting lower by about 3/4" definitely not what I wanted. My ? Is what's the best way to fix this ? Add a leaf maybe or a bigger rear block. Not sure if I want to go higher than a 5" block. or maybe air bags. I tow once in awhile about 9k. Anyone have experience with this ?