CHEVROLET C21 4 I MODEL REFERENCE W 1979 ROCHESTER 4BC W W W W W W Follow procedure outlined below to determine carburetor andlor part number 1 Determine vehicle model check VIN DIVISION CODE 2 Determine engine and carburetor type W 3 Part number can be determined by cross referencing W corresponding column number with same column W W number on charts W W VIN W PRODUCTION DIV CODE USAGE COL NO 17059207 1 5 All 305H wIM T 1 W 17059203 1 F 305L wIM T 2 17059216 1 5 A 35 80 305H wlA T A C 3 W 17059216 1 3 A exc 35 80 305H wlA T A C Fed 2 73Fl 3 17059216 1 A B F 350L wlA T A C Fed 3 Ir W 17059217 1 5 A 305H wIA T exc A C 4 W 17059217 1 3 A exc 35 305H wlA T Fed 2 73R exc A C 4 17059217 1 A B F 305L wlA T Fed exc A C 4 17059064 1 5 W A 305H wlA T A C Stamped 17059064 5 W W 17059502 1 All 350L wlA T Calif exc A C Stamped 17059502 6 W W 17059502 1 5 A 35 80 305H wIA T M3B exc A C Stamped 17059502 6 W 17059502 1 A exc A35 80 305H w A T Calif exc A C W W Stamped 17059502 6 17059504 1 All 350L wlA T A C Calif Stamped 17059504 7 W 17059504 1 5 A 35 80 305H wIA T M38 A C Stamped 17059504 7 17059504 1 A exc A35 80 305H wlA T A C Callf Stamped 17059504 7 W 17059504 1 A 305H w A C Calif SEO 9C1 9C6 Stamped 17059504 7 W 17059218 1 3 5 A 305H wlA T Fed 2 29R exc A C 8 W 17059222 1 5 A 305H wIA T M29 A C Fed 2 29 Ratio W W Stamped 17059222 9 W V 17059582 1 5 All 350L wlA T Alt exc A C 1 0 W 17059582 1 5 A 305H wlA T Alt exc A C 10 W 17059584 1 5 All 350L wIA C Alt L 11 W 17059584 1 5 A 305H w A T A C Alt J 11 W W 17059062 1 A 305H w A T MV9 exc A C 12 W 17059505 1 5 A B F 305H 350L wlA T Calif exc A C W W Stamped 17059505 13 W W 17059505 1234 X 350L wICaIif exc A C Stamped 17059505 13 W W 17059507 1 5 A B F Y 305H 350L wlA T Calif A C Stamped 17059507 14 W 17059507 1234 X 350L wICalif A C Stamped 17059507 14 GM PARTS DIVISION GENERAL MOTORS CORPORATION cREvROI ET 10 W REV 9 80 use c 3 000 GROUP