1. You'll need a lift for the 35s, but the 31s should have fit without a lift
2. If you lift your jeep for the 35s, this should fix itself. I be you have the stock suspension on there.
3. try
Muddy Rocks Offroad - the guys there are great (and they are a sponser here). If they can't help you, try Quadratec and 4wd.com
Welcom to Jeepz!