If you haven't already seen it, this is a write-up I've done to help you do a front end alignment.
http://wayalife.com/showthread.php?3861-Basic-Do-it-Yourself-Jeep-JK-Wrangler-Front-End-Alignment
Maybe I need to start a new thread for this, but I just went out and put a level on the tires. The passenger side is perfectly level when I set the level up against the tire, but the drivers side is over an inch out as seen by the photo.
Any thought by you seasoned Jeepers?
Bent C or axle housing.