Replacement alternator

I've got a Ford '3G' alternator from a '90s Thunderbird in my Dart. It still charges with 13.1v at 500rpm with headlights on and maintains 14.4v at all RPMs above that.

Bracket-redesign is necessary with this model alternator, but just about any modern alternator has better charging characteristics then those 30 year old ones.
Just don't get a 'too new' alternator which have computer controlled charging.