l I i CH EVRO LET MODEL REFERENCE 1978 ROCHESTER 4BC Follow procedure outlined below to determine carburetor andlor part number 1 Determine vehicle model check VIN DIVISION CODE 2 Determine engine and carburetor type 3 Part number can be determined by cross referencing corresponding column number with same column numberon chan VIN PRODUCTION DIV CODE USAGE COL N0 17058202 1 A80 350L wIA T Fed exc A C I 17058204 1 A80 350L wIA T A C Fed 2 17058502 1 A80 B 35OL w A T Calif exc A C 6 17058504 1 A80 B 350L wIA T A C Calif 5 17058582 1 B F X Y 350 wIA T Alt exc A C 3 17058584 1 B F X Y 350 wIA T A C Alt 4 I I 17058203 1 A80 35OL w M T 7 17058202 1 B F Y 350L w A T Fed exc A C Spl Hi Perf 1 17058204 1 B F Y 350L wIA T A C Fed exc Spl Hi Perf 2 17058203 1 F 350L w M T exc A C 7 17058502 1 F 350L w A T Calif exc A C 6 17058504 1 F 350L wIA T A C Calif 5 i 17058502 1 Z 350L w Calif exc A C 6 17058504 1 X 350L w A C Calif 5 17058203 1 Y 350 wlM T M20 7 17058210 1 Y 350 wlA T SI Hi Perf I2 I 17058211 1 Y 350 wIM T Spl Hi Perf exc A C 10 17058228 1 Y 350 w A T A C Sp Hi Perf II 17058502 1 Y 350 wIA T Calif exc A C 6 I 17058504 1 Y 350 w A C Calif A T 5 i i GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 10 REV 9 78 3 101 c 3 000 GROUP