CORVETTE ENGINE SERIES NUMBER AND SUFFIX CHART Cont 1961 283 8 CYLINDER Type TYPE Description Designation Description Designation Manaul Tans CO Dual 4BC and Hi Lift Cam CU Fuel Injection CR Powerglide DG Fuel Injection and Hi Lift Cam CS Powerglide and Dual 4BC DJ Dual 4BC CT Note CORVETTE engines have the last six digits of the vehicle serial number stamped on engine date boss Engines are stamped witn a source production date and type on serial pad 1962 327 8 CYLINDER Dual 4 BC OB Manual Trans and Fuel Injection RF Manual Trans RC Powerglide SC Manual Trans and High Performance RD Powerglide and High Performance SD Manual Trans and Spec High Performance RE 1963 327 8 CYLINDER Manual Trans RC Manual Trans and Fuel Injection RF Manual Trans and High Performance RD Powerglide SC Special High Pefformance RE Powerglide and High Performance SD 1964 327 8 CYLINDER Manual Trans RC Manual Trans and Transistor Ignition RT Manual Trans and High Performance RD Manual Trans Transistor Ignition and C A C RU Special High Performance RE Fuel Injection and Transistor Ignition RX Manual Trans and Fuel Injection RF Powerglide SC Manual Trans and C A C RP Powerglide and High Performance SD Manual Trans High Performance and C A C RO Powerglide and C A C SK Manual Trans Special High Performance and C A C RR Powerglide High Performance and C A C SL Note Engines are stamped with a source production date and type on serial pad 1965 327 8 CYLINDER Manual Transmission HE Powerglide HO High Performance HF Powerglide and High Performance HP Fuel Injection HG Powerglide and C A C HO Spec High Performance HH Powerglide High Performance and C A C HR C A C HI Spec Higi Performance and Hyd Lifters HT High Performance and C A C HJ Spec High Performance Hyd Lifters and C A C HU Spec High Performance and C A C HK Spec HIQ1 Performance Hyd Lifters and Transistor Ignition HL Transistor lgnition HV Transistor Ignition and C A C HM Spec High Performance Hyd Lifters Transistor Fuel Injection and Transistor Ignition HN Ignition and C A C HW 1974 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET P A 3OB T7