To convert you'll need the alternator, its mounting bracket and the adjuster, and the correct belt. Then if you want the correct multiplug for the alternator you will need that as well, which you can then run the two main wires from it to pick up the main feed from the starter motor. The 4TR control box will need to be disconnected along with the warning light control, and replaced with an ignition controlled feed through the warning light to the small terminal on the alternator.