GM 3947772 made by Schwitzer stamped "3947772", "914087" and a stamped date code. 70 Chevelle Camaro Nova Impala OEM Clutch Fan 7 Blade 3947772 A 70 LS6 L78 ZL1 396 454 350 LT1 Z28. Applications : 19 70 396 454engines ( with clutch fans) - Chevelle, Camaro, Nova, Impala etc.
