B326 BUICK MODEL REFERENCE 1981 ROCHESTER 4BC 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 V COL N0 17081253 34 B Exc 35 307 w Fed Closed Loop NB1 A T M31 1 17081253 34 E 307 w Fed Calif I 1 17081245 4 B 4 1 4 w A T MX2 A C 2 17081247 4 B 4 1 4 w A T MX2 Exc A C 3 17081248 4 B C 4 1 4 w A T MW9 A C 4 17081249 4 B 4 1 4 w A T MW9 Exc A C 5 17081289 34 E 4 1 4 6 17081242 4 E 231 3 w Closed Loop NB1 7 17081243 1 4 A 231 3 8 17081254 34 B C 307 w A T MW9 Fed Calif Closed Loop NB1 9 WAREHOUSlNG AND msrmsuriom Division OF GENERAL morons COF lPORATION BUlCl 41 REV 5 81 3 171 c 3 000 GROUP