Since it's your daily driver I would suggest starting with a leveling lift and 33" mud terrain (MT) tires with either new wheels with 4 1/2" back spacing or 1 1/2" wheel spacers. If you have 4.11 gears you could even go with 35" tires and chop your fenders. With 3.21 or 3.73 I wouldn't go any larger than 33s with the 3.8 engine. Mine had 3.73 gears and did very well with this kind of set up for several years. Unless you plan on serious rock crawling you will likely be happy with this set-up for some time.