I saw you posted on my FABO thread not too long ago. Your tire selection seems ok. I'm not too sure on the rear as the Duster should allot more tire clearance naturally and you're using a different offset rear end with offset shackles. However, I'm thinking your offset in the front may be a bit too much? I know of guys using something closer to a +32-35. With my piss poor alignment (still way off) I was contacting at full lock and full droop at the rear of the frame rails with a +30mm offset.