Pulley Water Pump Upper Single Groove Long Water Pump Lwp Polished Alloy Small Block Chevrolet 265-400 1969-85. Machined aluminum finish, Single belt groove, and 6.6 Inch diameter. Easy to install. All of our pulleys are designed to work in OE applications and with the OE style serpentine or v-belt configuration. Bolt Circle is 2.30 Inch
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