If you do that, I may be interested in the "take off" parts...
I do know that you will be plugging a bunch of holes in the fenders, and you'll need a different fuel filler hose (maybe be able to fab one from what you have)
I think the axles are actually different (the dually axle is wider) but I'm not sure on that one
3.55 gears will definitely get better mileage, but changing will throw off your shift points and speedo
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