I have considered jumping to 35's and I may have found a set of 315 75 16 duratracs for cheap. I have over 3" of suspension lift and plan to run 1.5 wheel spacers. I understand though, that there is some difficulty running 315's on our stock 7" wide wheels. If I was able to find someone to mount those behemoths on my stockers, outside of fender trimming, would this be an acceptable setup? Do I need or is a BL recommended? Will these tires be a danger to my differentials?