I'm going for the Zone leveling kit here in the next few weeks.....it's nice to see a leveled regular cab on here. I'll be sure to post pics too. I'm also going to measure MPG differences as well.
(side note, I have the 4.3 too. It's more than enough power for what I use, tows 7200lbs, and gets 24-26 on the highway in the real world)