1979 CHEVROLET ENGINE IDENTIFICATION A SERIES ASSEMBLY CODES 200 CID LZ6 OPT 23 A CID 4 LD5 OPT 305H CID LG4 OPT DHA RA RM DNS DNW DTA DHB RB DNT DNX DTB DNU DNV 267 CID L39 OPT 350L CID LM1 OPT I DMA DMD DRX I DMB DMF I Mc DMH B SERIES ASSEMBLY CODES 250 CID L22 OPT 305G CID LG3 OPT 350L CID LM1 OPT DKB DCE DNL DTC DRA DRK DUB DKC DCC DNM DTD DRB DRL DUC DKD DCD DNR DRH DRY DUD I I DCA DRJ DRZ I I F SERIES ASSEMBLY CODES I 250 CID L22 OPT 305G CID LG3 OPT 350L CID LM1 OPT I DKA DNF DNZ DRC DRH DRY DKB DNH DTM DRD DRL I DKD DNK DTR DRF DRW l H SERIES ASSEMBLY CODES I 151 1 CID LS6 OPT I 151 9 CID LSB OPT I 151V CID LX8 OPT I AC ZR XJ AD ZP AM I AD WD XK ZA ZR I ZF WJ AB ZB AF 196 CID LC9 OPT 231A CID LD5 OPT 305G CID LG4 OPT FC NA NC DNA DNC DTK FD NB NF DNB DND DTL I X SERIES ASSEMBLY CODES 231AICID LDS OPT I 250 CID L22 OPT 305G CID LG4 OPT I I RX I NG DKA DKD DNF DNK I RY RF DKE DNJ DNZ 35OL CID LM1 OFT I DRJ I DRY I T SERIES ASSEMBLY CODES 1 6E CID L17 OPT I 1 6O C 5 II1 DP DBA DBK DBU DSB DBB DBL DBW I DBC DBM DBX DBD DBR DBV DBF DBS DBZ DBH DBT DSA I DEJ I I I I GM PARTS DIVISION GENERAL MOTORS CORPORAT ON CHEVROLET 1O Z3 I