Ford Small Block V-Belt Water Pump Pulley (4 Bolt Crank) for 302, 351W and 351C engines. These underdrive pulleys are designed to fit 1965 - 1969 Ford Passenger cars 1965 - 1977 Ford Pick-up Trucks with transplanted 1969 1/2+ engine. Requires 4 bolt crank and passenger side lower radiator hose. Dampener face to water pump flange face 3 1/4". (Does not Fit Ford Racing Short Water Pump) Pulley diameter is 6.2" with .625" pilot diameter.