1967-70 THIS IS AN AFTERMARKET "POWER MASTER" CHROME 65 AMP ALTERNATOR FOR CARS WITH EXTERNAL REGULATOR. PULLEY SIZE: 2 1/4"(CHROME PULLEY AND FAN).

1971 - 81 THIS IS AN AFTERMARKET "POWER MASTER" CHROME 70 AMP ALTERNATOR FOR CARS WITH INTERNAL REGULATOR. (CHROME PULLEY AND FAN).