FUEL EXHAUST CARBURETION CHEEVROLET MODEL REFERENCE 1983 ROCHESTER 4 BC FOLLOW PROCEDURE OUTLINED BELOW TO DETERMINE CARBURETOR AND OR PART NUMBER 1 DETERMINE VEHICLE MODEL CHECK VIN DIVISIONAL CODE 2 DETERMINE ENGINE AND CARBURETOR TYPE 3 PART NUMBER CAN BE DETERMINED BY CROSS REFERENCING CORRESPONDING COLUMN NUMBER WITH SAME COLUMN NUMBER ON CHARTS VIN PRODUCTION DIV CODE USAGE COL N0 17083205 12 F 305 7 1 17083207 12 F 305H W M T MKG CLOSED LOOP 2 17083204 12 F 305H W A T MD8 CLOSED LOOP 3 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS CHEVROLET 17F REV 6 88 CARB 4BBL ROCH 7 3 I25 GTROUP