1 666 SCREEN 2 272 sI IAI 1 5 639 PIN a G1 1609 RETAINER Hm Nss SLEEVE W 1 609 SPRING 6 3 C V A 1 609 VALVE wss N 0 Mss I V0 1975 1981 NS L OIL PUMP 366 427 ENGINE 8P 9 1975 81 OIL PUMP W 366 427 ENGINE wAREI IOUSING AND DISTRIBUTION DIVISION OF GENERAL MOTORS cORPORATION s2TM GR F 7 83 1c 1 1 1 000 GROUP