ENGINE IDENTIFICATION 1974 Model Description Code 250 6 CYLINDER 0 50 AMA 292 6 CYLINDER C 50 60 S 60 ARA 350 8 CYLINDER 0 50 Manual Trans I lVIT C 60 S 60 A T 475 exo Air Brake TMU C 50 60 S 60 A T 540 exc Air Brake TMW C 60 60 Manual Trans exc Air Brake L P Gas l lVlX 8 60 Air Brake w A T 475 TMY C 60 60 Air Brake w A T 540 TMZ C 60 S 60 Air Brake w Manual Trans TWA T 60 A T 540 TWB T 60 Manual Trans TWC 0 60 L P Gas TWD 366 8 CYLINDER 060 65 M 65 L P Gas AFT T 60 65 L P Gas AFU T 60 65 Manual Trans exc L P Gas AHA C 60 S 60 A T 475 AHB C 60 65 M 65 S 60 Manual Trans exo L P Gas AHK 0 60 65 S 60 A T 540 AHM T 65 A T 540 AH R M 65 M T 650 G AHS 427 8 CYLINDER 0 65 M 65 Manual Trans AKT T 65 AKU 0 65 M 65 MT 640 G 650 G AKW 10