I've got 35" BFG with 3. 54 gears. I'm happy with the performance but dont tow much. I did notice a drop in power. With 245's I coud go up Floyd hill (I70 Denver West) @ 80 in OD, with 35's I strugle to keep it at 65 in OD. In drive its no problem.
I havn't tried the hill with the new injectors, but performance seems a lot better. Milage has been a steady 16 - 18 around town
I did cut a little plastic on the inside of the front fenderwell to keep from rubbing(3 min. w/razor).
I would do it again. I'm on my 3rd year running 35's with no problems. Looks good and I like the view you get.