Chevrolet small block aluminum crankshaft pulley, triple groove, short water pump, v-belt, Transdapt 8880. Made of 356 aluminum alloy, heat treated to T-6 specs. Pulley diameter is 6 7/16" with a 2 1/16" depth. HOW TO IDENTIFY YOUR PULLEY DESIGN: The "short" water pump almost touches the timing cover. The "long" water pump stands out from the timing cover about a "fingers width". Short water pumps wre commonly used on 1955-1974 Chevrolet small blocks with power steering and air conditioning, but can be used on newer applications where the the older short water pump is used. To use this pulley on newer enignes, all acceossory brackets and pulley must be designed for the short water pump. Chevrolet small block aluminum crankshaft pulley triple groove short pump Transdapt 8880 8880 HOURS: 11:00 am to 6:00 pm Monday - Friday Eastern Standard Time We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. We will not ship to freight forwarding - expediting companies. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.