ENGINE SERIES NUMBER AND SUFFIX CHART Cont I 967 Cont 40I 6 CYLINDER Type Model Description Designation HM70 JM70 TM70 HM80 JM80 TM80 WM80 401 6 Cyl STD 478 6 CYLINDER GAS HM80 JM80 TM80 WM80 RPO L29 DIESEL PT20 30 lT40 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 JJ70 TJ70 D637 6 Cyl 4 Cycle Diesel STD HJ70 JJ70 TJ70 DH637 6 Cyl 4 Cycle Diesel RPO L49 TYP Type Model Description Designation Model Description Designation T60 Allison Auto XD I968 roo Allison Auto xl 427 8 CYLINDER 250 6 CYLINDER C60 M60 Manual Trans XW Cllll 40 Manual Trans TM roo Manual Trans xv T40 Manual Trans TP i 292 o CYLINDER T 969 C50 60 M50 S50 Manual Trans UA cso ss0 coo Allison Automatic mos ul 25 6 CY N E C60 Manual Trans UL coo Allison Auto UK c QA T40 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 S 50 Allison Auto RY C 50 S 50 Manual Trans SA 7 Y c so s so Allison Auto sn C 40 40 Manual Trans SC T40 Manual Trans WK 50 g a 0 Manual Trans SD C40 Manual Trans W1 c s0 s so Allison Auto se C 50 Allison Auto QP C 50 Manual Trans QH l C 50 Allison Auto QI 327 8 CYLINDER C 50 Manual Trans OJ T 50 Manual Trans SF C50 60 Nl50 S50 60 Manual Trans YW cso so sso oo Allison Auto YO T 50 M a T SG C60 S60 Manual Trans YF H coo soo AIIISOIT Auto vp 350 8 C ER T50 60 Manual Trans YM C 40 Manual Trans XH M 50 C 60 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 60 550 60 Manual Trans XA C 50 M 50 50 Manual Trans XS C50 60 M60 S50 60 Allison Auto XB C 50 50 Allison Auto XU T50 60 Manual Trans XC C 50 S 50 Allison Auto WE T 197O CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATlON P A 31S T 30