If you have torsion bar suspension up front its almost bolt on, if you have coil springs you need a frame with torsion bars. Assuming you have the torsion bar suspension up front, you wil need a 4wd trans, transfer case, both driveshafts, front differential(gears to match rear), both axle shafts, and spindles. The next issue is the electronics for the 4wd. If you want an electric transfer case you have to change the dash harness, get a radio bezel with a switch and a cluster with the 4wd lights(optional). If you go manual transfer case, you don't have to do the wiring. You may be better off trading your truck in, especially if you are not mechanically inclined enough to do it yourself.