Well I run 265/70/17 on my 2wd with no lift or leveling. I think that tire comes in just under 32" with only minor rubbing on the plastic inner fender liner (at full lock)

35" tires can get tiresome on the 46RE quick, 33" would probably fit/look pretty good without too much strain.

 

With the diesel springs, and 3" body lift, you *might* be able to get away with 35's. I would have a chat with your local tire dealer, and test fit some, and see what ya get.