ENGINE IDENTIFICATION 1975 Model Description Code 292 6 CYLINDER C50 60 S60 Manual Trans ARB C50 60 S60 Manual Trans w Low Compression Eng ARC 350 8 CYLINDER C50 Manual Trans TMT C60 S60 Manual Trans exc Air Brake TMX C60 S60 Manual Trans w Air Brake TWA C60 S60 A T 475 exc Air Brake TMU C60 S60 A T 540 exc Air Brake TMW C60 S60 A T 475 w Air Brake TMY C60 S60 A T 540 w Air Brake TMZ T60 Manual Trans TWC T60 A T 540 TWB C50 Manual Trans w Low Compression Eng AAD C60 S60 Manual Trans w Low Compression Eng AAH 366 8 CYLINDER C60 65 S60 M65 Manual Trans exc Exh Emission Control AHD C65 M65 M T 640G 650G exc Exh Emission Control AHH C60 65 S60 A T 540 exc Exh Emission Control AHJ C60 65 S60 A T 475 exc Exh Emission Control AHL T60 65 Manual Trans exc Exh Emission Control AHU T60 65 A T 540 exc Exh Emission Control AHW C60 65 S60 M65 Manual Trans w Exh Emission Control AHX C65 M65 M T 640G 6506 w Exh Emission Control AHY C60 65 S60 A T 540 w Exh Emission Control AHZ C60 65 S60 A T 475 w Exh Emission Control ATA T60 65 Manual Trans w Exh Emission Control ATB T60 65 A T 540 w Exh Emission Control ATC 427 8 CYLINDER C65 M65 Manual Trans exc Exh Emission Control AKA C65 M65 M T 640G 650G exc Exh Emission Control AKB T65 Manual Trans exc Exh Emission Control AKC C65 M65 Manual Trans w Exh Emission Control AKD T65 Manual Trans w Exh Emission Control AKJ C65 M65 M T 640G 6506 w Exh Emission Control AKH 11