Crankshaft oil slinger for all FE Ford V-8's, starting 1958 until at least through 1976. 1967-69 390 engines, 1968 427-4V engines, 1968-70 428, 428CJ, 428SCJ engines, 1958-66 352, and 1968-76 360 engines. Goes on the crankshaft after the timing gear and before the timing chain cover. It does have a purpose on the vintage engines.
Ford part number B8A-6310-A.