Chevrolet big block aluminum water pump pulley, short water pump, single groove, v-belt, Transdapt 8874. Made of 356 aluminum alloy, heat treated to T-6 specs. Pulley diameter is 6 7/16" with a 2 7/8" depth.
HOW TO IDENTIFY YOUR PULLEY DESIGN: The "short" water pump almost touches the timing cover. The "long" water pump stands away from the timing cover about a "fingers width". Short water pumps were commonly used on the older big blocks. All accessory brackets and pulleys must match the short water pump design.
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