I wouldn't bother changing from 4.10 to 4.56 regardless. There's so little of a change. Lot's of guys change to 3.55 for mileage. Personally I like more gear, but I wouldn't spend that kind of money just for a couple hundred RPM. Especially since you're really not looking at a significantly larger tire. It's only an inch or so bigger than stock. A lot wider though.