That depends on how far you wanna go, at the least you will need a tranny, driveshaft, and i believe the GEM box, if you want true 2wd you will need the front spindles from a 2wd and drop out the front halfshafts and diff, otherwise you will have a 2wd but the front tires will still turn the front axles and diff, you didn't say what motor you have, but if its the v8 you will not need the GEM swap as the v8 GEMs are all 2wd