This is a GM 100 Amp replacement alternator for external regulators.
This is a high amp replacement for early GM vehicles with an external regulator. We build these units to provide 80 amps at an idle. Now you can have more amperage and still keep the vehicle looking original. This alternator will replace externally regulated alternators from 1963 through 1972 year models. You can even use this high output unit with your factory regulator.