1960-63 Hot Riveted Flywheel .This flywheel has been professionally rebuilt and riveted, balanced, and resurfaced to specifications, and we guarantee the rivets will not fail. A core charge is included in the price. Upon receipt of your rebuildable core,no bent ones or rusted out ones, you will receive a $30 refund. Please send core within 30 days of receiving your parts. If you have any questions about this item, contact us at the shop at 918-753-2486.