Some clarification is needed. Is this a 2wd truck that you are converting to a 4x4, or is it already a 4x4. If it is already a 4x4, it should already have 4.10's. If you are converting a 2wd, you don't want 4.10's since you will likely run at least 33's and will need 4.88's if manual or 5.29's if auto, or 5.29's if you are going to run 35's or bigger.
And if its a 2-wheel drive thats a 7.5 rear end too right..
