This is a NOS New Original Ford Lower Crankshaft Pulley for a 1969 1970 Shelby GT350  and 1969 Ford Fairlane Torino Ranchero with a 351W 351 Windsor 5.8L V8  With Air Conditioning. This is Ford part number C9ZZ-6A312-B and has ID number C9ZE-6312-B. It is a 3 Sheave pulley with the two inner sheaves measuring 6 1/2" diameter and one outer sheave ( closest to the radiator )  measuring 7 1/4"  in diamter.  This has never been bolted to an engine and is in excellent condition.  These are difficult to find as they are UNIQUE to 1969 only. If you have any questions you can reach us at 609-448-1684 from 10am to 6pm Eastern time. Thanks for looking and Happy Ebaying! (Middleroom043018)