If you can get the brushes, diodes, rectifiers and bearings, rebuilding alternators is pretty easy. The hard part will be finding the parts. No one seems to sell them anymore. Plus, a rebuilt is pretty cheap these days. My brother probably has a half dozen laying around his garage if you want a used one. Check the output voltage first, though. These cars are notorious for dimming at idle. That's why I went to relay systems for most of my lights.