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1970 1973 Mercury Cougar / Ford Mustang D0AE-6312-C 351 Crankshaft Pulley - Used(Click Here for More Information or to Order) Part #: D0AE-6312-C Price:$55.00 
 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 351-4Vs.

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1970 1971 Mercury Cougar / Ford Mustang D0OE-6312-A 351 Crankshaft Pulley Used(Click Here for More Information or to Order) Part #: D0OE-6312-A Price:$88.00 
 D0OE-6312-A For both Windsor and Cleveland 351 engines starting in 1970. This is a single sheave pulley, meaning without air conditioning and without power steering. One groove with a diameter of 6-11/16 inches in diameter.
Ford Master Part number D0OZ-6A312-A. A four bolt hole crankshaft pulley for use with 1970 and upward crank dampeners.

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1970 1972 Mercury Cougar / Ford Mustang D0OE-6312-B 351 Crankshaft Pulley Used(Click Here for More Information or to Order) Part #: D0OE-6312-B Price:$35.00 
 Has casting number D0OE-6312-B stamped on the inside. Application for 1970 all 351 engines, 1971 M code 351-4V, and 1971 and 1972 H code 351-2V engines with power steering or idler pulley. Dual sheave crankshaft pulley measurement of 8.00 and 6-11/16 diameters. No air conditioning. Ford Master Part number D0OZ-6A312-E. Four bolts hold it on too.

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1970 1972 Mercury Cougar / Ford Mustang D0OE-6312-C 351 Crankshaft Pulley Used(Click Here for More Information or to Order) Part #: D0OE-6312-C Price:$88.00 
 D0OE-6312-C For both Cleveland and Windsor 351 engines. This is also the with air conditioning pulley, but with power steering option. Triple sheave 8.00, 7-55/64, 6-9/16 diameters. A four bolt hole crank shaft pulley for use with 1970 and upward crank dampeners. Ford Master Part number D0OZ-6A312-B.
This is a Service Replacement pulley for D0AE-6312-C.
*Excludes 1972 Q code 351 Cobra Jet engines. This means all 1972 351C-4V engines.

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1970 Mercury Cougar / Ford Mustang D0ZE-6312-B BOSS 302 Crankshaft Pulley Used(Click Here for More Information or to Order) Part #: D0ZE-6312-B Price:$345.00 
 D0ZE-6312-B Application is 1970 Boss 302 Eliminator with or without power steering. Triple sheave pulley 5-15/16 and dual outer 6-11/16 diameter. Ford Master Part number
D0ZZ-6A312-A. Also a four bolt mount to the crankshaft balancer.
The reason for a triple sheave pulley on Boss 302 engines is the inclusion of the Thermactor Smog system from the factory. Smog pumps were placed so that they worked off of the outermost pulley groove on a 3 sheave crankshaft pulley. If with power steering the middle belt would be for the PS pump. Without PS, their would be two belts for the alternator.

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1968 - 1970 Mercury Cougar / Ford Mustang C8AE-6312-D 390 / 427 / 428CJ Crankshaft Pulley Used(Click Here for More Information or to Order) Part #: C8AZ-6A312-D Price:$95.00 
 Ford part number C8AZ-6A312-D. Applications:
1968 390-2V without air conditioning, with dual alternator belts, and with power steering.
1968 - 1969 390-4V, 427 GT-E, or 1968 - 1969 - 1970 428 Cobra Jet engines. All without air conditioning. All with dual alternator belts, and with power steering.
Ford casting number C8AE-6312-D. Triple sheave 68 69 70 crank pulley.

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1969 - 1970 428 Mercury Cougar / Ford Mustang C9OE-6312-D Cobra Jet Crankshaft Pulley Used(Click Here for More Information or to Order) Part #: C9OZ-6A312-F Price:$225.00 
 C9OZ-6A312-F. Application 1969 and 1970 428CJ all with air conditioning, power steering optional. Ford casting number C9OE-6312-D. Triple sheave 69 70 428 CJ crank pulley.

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