Used crank shaft pulley for any 1969 Mercury Cougar or Ford Mustang with 351w engine. This is a single groove pulley with a 6-1/8 inch diameter, and would have been used without power steering. One belt just for the water pump and alternator. Also fits other cars with 351 Windsor engines without P/S.
Replaces Ford part number C9OE-6A312-D.