When you switch from one set of axels, say 1/2t to 3/4t, what all would you need to change? I have 33's but my next set will be 35's. I'm leaning towards 4.56 gears if I can find them at a yard or somewhere inexpensively. I would really like to be able to just put one under where I removed the original. Is this possible or will I need to change other things also? I have a 78 th350/np203 1/2t 3.08 (I believe, I'm assuming it's stock), 4" lift. If that info helps.