D0AE-6312-C For both the Cleveland and Windsor variety. Starting in 1970 Ford tried to standardize many of the engine parts. This is the "with air conditioning" pulley for all 1970 - 1971 351-2V & 351C-4V engines, and all 1972 -1973 351-2V engines. Triple sheave 6-23/32", 8.00", 8-13/32" inch diameters. A four bolt hole crank shaft pulley for use with 1970 and upward crank dampeners. Ford Master Part number D0AZ-6A312-C. *Excludes 1972 and 1973 Q code 351CJ engines. This means all 1972 and 1973 351-4V's.