No Chrome Alternator for me either.

I agree with 67Dart273 and therefore disagree with '64 Cuda. I don't think the regulator knows anything about the current output of the alternator. It senses voltage, not current flow. The old mechanical ones are an on-off control. The electronic ones are proportional, i.e. the lower the battery voltage they sense, the more field current they apply.

A bigger problem with the higher output alternators is that you can fry your ammeter in the dash and associated wiring connections. That is a bad day. There are some solutions posted to bypass it or install a voltmeter in its place (like later cars). I am thinking of a designing a bypass circuit that lets it still work, but protects it from overload. Someday.

I recall the original alternators are spec'd as 30A, but as Cudaroy says, actual output depends on engine speed. I recall J.C. Whitney used to have upgrade kits where you replace the field coils to give ~60A output.