Alternator + Electric Radiator Fans = Need Recommendations

[saxart]

Yesterday I was going to bolt up the alternator to the freshly painted brackets on my crate engine, but stopped when I realized the alternator bearings are old and dry sounding.

This truck has a busted up fan shroud, so all of this just screams to be converted to an electric fan set up with an alternator that will run it.

So, can you school me on alternators?

• 1 wire or 3?
• Internally regulated or externally?
• What size output is needed for this set up?

For the electric fan set up, I'd to grab something from the local U-pull to keep the prices low and have read that the Windstar 3.8L fans can work, are there other options that are better? Any and all recommendations are appreciated.