1965-69 rebuilt alternator: 37 amp. a $ 30 core charge is included in the price, it is refundable upon receipt of your rebuildable core, please send core within 30 days of receiving your parts, or call for other arrangements, must come with the correct fan. In order not to void the warranty, make sure you change your old voltage regulator when installing this unit. For any questions, call Rafee at the shop at 918-753-2486.