Update:
I'm going with your advice. I searched tires for a while, and I believe size 305-60-18 tires are what I'm after. They are about 32.5 inches tall and 12 inches wide. I'm hoping I can get them in with little to no trimming necessary (I have OME 912s in back and t-bar crank up front). I found the BFG MT TA KM2 tires for 306 each at tirerack.com. I then checked with my brother and he can get them for me at that price through his work at a local Ford dealership. That way I can avoid shipping charges. Yay
So, hopefully by next weekend or so, I'll have some new pics with my new wheels and tires.