all doable - see the pic below where my mate has cut his guard/fender and rear door to accommodate bigger rubber.
I think you will need to do a lot of chopping to stop the 305's from scrubbing on articulation. One of the many things I like about the 255/85R16 BFG KM2's on mine is that they tuck up nicely on articulation at standard EAS height (with 2" lift).
http://paulp38a.com/gallery/d/6376-2/IMG_0136.JPG

