l cREvn0tEr i 1 l CHEVROLET MODEL REFERENCE y 1977 HOLLEY 2BC l Follow procedure outlined below to determine carburetor andlor part number 1 Determine vehicle model I 2 Determine engine and carburetor type 3 Part number can be determined by cross referencing corresponding column with same column number on chart l PRODUCTION USAGE COL N0 458102 H w A T wIA C C60 140 Federal 4 V 4 458103 H w M T wlA C C60 140 Federal 2 l 458104 H w A T 140 exc C60 Federal 3 i 458105 H w M T 140 exc C60 Federal 1 458106 H w A T A C C60 140 Calif 8 458107 H wIM T A C C60 140 Alt or Calif 6 Q 458108 H wIA T 140 exc C60 Calif 7 L 458109 H w M T 140 exc C60 Alt or Calif 5 j 458110 H wIA T A C C60 140 10 458112 H wIA T 140 exc C60 Alt 9 E GM PARTS DIVISION GENERAL MOTORS c0RPORAT oN cHEvROLET 10 REV 9 78 45 c 3 000 GROUP