I have a early 99 superduty F-350 crew cab long box 4x4. I need new tires before the snow flies, the front end of my truck is sagging a lot it looks like. I want to put a leveling kit in the front, what size/kind or kit would be best? Plus what would be the biggest size tire I could put on it with no fender rubbing? Thanks for any help. P.s. I want to post a picture of the truck, but have no clue on how to from my phone. Is there a way to do it?