Faithfull stamped steel reproduction with correct part number and code die stamped as originals. Indispesable when adding air conditioning to long water pump motors, including Vintage Air and other aftermarket A/C kits that do not include needed pulleys. Group #: 0.659 GM Part #: 3937787
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||1969 - 1975
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Classic Headquarters Big Block Triple Groove Crankshaft Pulley with Ac W-037: