73 Dart Alternator doesn't show charge anymore.

Should I just get a new alternator at this point? the threads being broken off is not my idea of good condition, I'm pretty sure the choke still has a wire but I needa check later.

Car doesn't cold start well without the choke, even out here.

If I did get a new alternator, should I just get a 1 wire? And what amperage should I shoot for?