ENGINE SERIES NUMBER AND SUFFIX CHART Cont I 967 Cont R Q 40t 6 CYLINDER WIN Model Description Dosignotion HM70 JM70 TM70 9 I 0 HM80 JM80 TM80 WM80 401 6 Cyl STD 478 6 CYLINDER GAS HM80 lM80 TM80 WM80 I RPO L29 r DIESEL Fl20 30 TT40 3 53N 3 Cyl 2 Cycle Diesel STD CD50 CD60 TD50 TD60 4 53N 4 Cyl 2 Cycle Diesel STD HV70 Jv70 TV70 6V 53N 6 Cyl 2 Cycle Diesel STD CG50 CG60 TG50 TG60 D478 6 Cyl 4 Cycle Diesel STD CG50 CG60 TG50 TG60 DH478 6 Cyl 4 Cycle Diesel RPO L53 MG60 DH478 6 Cyl 4 Cycle Diesel STD HJ70 J l70 TJ70 D637 6 Cyl 4 Cycle Diesel STD HJ70 JJ70 TJ70 DH637 6 Cyl 4 Cycle Diesel RPO L49 Tw vl Model Description Designation Model Description V Designation T60 Allison Auto XD I968 too Allison Auto xl I 427 8 CYLINDER A 250 6 CYLINDER s C60 M60 Manual Trans XW C40 S40 Manual Trans TM A too Manual Trans xv T40 Manual Trans TP p 292 o CYLINDER 1969 C50 60 M5D S50 Manual Trans UA 9 cso ssc coo Allison Automatic Trans ul 5 CY N ER A C60 Manual Trans UL coo Allison Auto ul S QA TAO S40 Manual Trans UY T40 Manual Trans UX 292 6 CYLINDER T50 Manual Trans UD T50 60 Manual Trans UE C 40 S 40 P 40 Manual Trans RF P 40 Manual Trans RV C 50 50 Allison Auto RY 3 7 8 CYLINDER lxllaggal gags I c 4o s ao lvl IT jjjjiijj 40 Manual Trans WK c so s so Mgmt C40 Manual Trans A WJ C 50 5 50 Allison Aut0 SE C 50 Allison Auto QP C 50 Manual Trans QH C 50 Allison Auto QI 0 327 8 CYLINDER A C 50 Manual Trans QJ T 50 Manual Trans SF 050 60 M50 S50 60 Manual Trans YW A A cso oo ssc oo Allison Auto YO T 50 M mm SG C60 S60 Manual Trans YF H coo soo Allison Auto YP 35 8 cY E T50 60 Manual Trans VM C 40 L Manual Trans XH M 50 C 6O Manual Trans Xl C 50 S 50 Allison Auto XJ 366 8 CYLINDER C 60 Manual Trans XN C 40 Manual Trans XS C50 60 M50 60 50 60 Manual Trans XA C 50 M 50 S 50 Manual Trans XS A C50 60 M60 S50 60 Allison Auto XB C 50 S 50 Allison Auto XU i T50 60 Manual Trans XC C 50 S 50 Allison Auto l l E GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM 32