Really nice truck, congratulations. You probably already know that any modification you do is going to mess with your fuel mileage. I decided not to mod mine. Had enough of that with my Jeep. If I off-road the truck it’s just hard pack or dirt roads anyway. For bigger tires you are going to need wheel spacers and have to cut the wheel well corners for clearance, they sell a kit for that somewhere. My buddy did it, the 35s look cool but where he cut the body corners, not nice.