That's right, your 5-speed does come with 3.07s in the diffs. I think you would like the 4.56's a lot. I used to run 4.56 with my AW4 auto and 33's. The gearing was an exact match. I'm betting 4.11's will put you back to about stock ratio with 33's, 4.56's will give that little extra low, but nothing drastic at all.