ENGINE IDENTIFICATION 1977 Model Description Code 292 6 CYLINDER C50 60 Manual Transmission ARD 350 8 CYLINDER C50 Manual Trans w Exh Emission Control AAM C50 Manual Trans exc Exh Emission Control TMT C60 S60 Manual Trans exc Air Brake Exh Emission TMX C60 S60 Manual Trans w Air Brake exc Exh Emission Control TWA C50 60 A T 540 exc Air Brake 84 Exh Emission Control TMW C60 S60 A T 540 w Air Brake exc Exh Emission Control TMD C60 S60 Manual Trans w Exh Emission Control exc Air Brake AAA C60 S60 A T 540 w Exh Emission Control exc Air Brake AAF C60 S60 Manual Trans w Air Brakes Bi Exh Emission Control AAB C60 S60 A T 540 w Air Brakes Bi Exh Emission Control AAJ T60 Manual Trans exc Exh Emission Control TWC T60 A T 540 exc Exh Emission Control TWB 366 8 CYLINDER C60 65 S60 M65 Manual Trans exc Air Brakes Exh Emission Control AFH C60 65 S60 M65 Manual Trans w Air Brakes exc Exh Emission Control AFD C60 65 S60 A T 540 w Air Brakes exc Exh Emission Control AFF C60 65 S60 M65 A T 540 exc Air Brakes Exh Emission Control AFJ AKL M65 A T 650 w Air Brakes exc Exh Emission Control AHH C60 65 S60 M65 Manual Trans w Exh Emission Control exc Air Brakes AKM C60 65 S60 A T 540 w Exh Emission Control exc Air Brakes AKR C60 65 S60 M65 Manual Trans w Air Brakes Exh Emission Control AHX C60 65 S60 M65 A T 540 w Air Brakes Exh Emission Control AHZ C M65 M T 640 6506 w Air Brakes 84 Exh Emission Control AHY C60 65 M65 Manual Trans w PTO and 4 BBL Carb AFL T60 65 Manual Trans exc Exh Emission Control AHU T65 A T 540 exc Exhaust Emission Control AHW 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 C65 M65 Manual Trans w Exh Emission Control AKD C60 65 M65 M T 640G 650G w Exh Emission Control Air Brakes AKH C65 A T 540 exc Exh Emission Control AJA ALA C65 A T 540 w Exh Emission Control ALC C65 Manual Trans w P T O and 4 BBL Carb ALF T65 Manual Trans exc Exh Emission Control AKC T65 M T 640G 650G exc Exh Emission Control AKS T60 65 Manual Trans w Exh Emission Control AKJ T65 M T 640G 650G w Exh Emission Control AKX T65 A T 540 exc Exh Emission Control ALB T65 A T 540 w Exh Emission Control ALD I 13