65 Ser 60 327 2nd design exc w o pulley 12 holes in weight TILT drill pin balanced 3879839 1 16 30 66 Ser 50 250 lst design exc TILT w 2 groove pulley 3876722 1 11 55 65 66 Ser 50 60 292 2nd design Ident by Z deep counter bore on rear J of inertia member 3883214 1 18 35 66 ALL 366 W 4 groove pulley 3877055 1 17 75 A 66 Ser 50 w nodular crankshaft 283 exc TILT w 0 pulley 6 O D 3883956 1 14 40 66 Ser 50 w forged crankshaft 283 lst design exc TILT w 0 pulley 3883204 1 14 80 66 Ser 50 w forged crankshaft 283 2nd design exc TILT w 0 pulley 3896903 T 1 66 Ser 50 250 2nd design exc TILT w 2 groove pulley 3896590 T 1 66 Ser 60 327 exc TILT w o pulley 3894331 T 1 16 30 TNOTE Requires key for A deep keyway 55 56 Ser 5 lst design exc P S 55 56 Ser 6 8 8 cyl lst design exc A O H B 55 62 Ser 4 8 cyl 60 62 Ser 50 8 cyl exc 40 50 amp L C I 62 amp A C Gen PULLEY stamped 3742991 3742991 1 1 51 55 58 Ser 5 w P S A O H B 59 Ser 5 w P S exc A O H B 58 59 Ser 6 w A O H B 8 cyl 56 59 Ser 7 283 56 59 Ser 8 w Air Equip 283 60 61 Ser 50 W 40 50 amp L C I 8 cyl 60 61 Ser 60 thru 80 8 cyl 62 Ser 40 50 w 62 amp A C Gen 8 cyl 62 64 Ser 60 80 8 cyl exc TILT 63 66 Ser 50 283 exc TILT PULLEY double stamped 3766987 3858533 1 2 54 56 59 ALL w Air Equip 322 PULLEY front single stamped 3731351 3731351 1 3 85 56 59 ALL 322 PULLEY rear double stamped 3731350 3731350 1 6 50 56 57 Ser 5 2nd design exc P S 56 57 Ser 6 8 8 cyl 2nd design exc A O I I B 58 Ser 5 exc P S A O I I B 58 59 Ser 6 8 cyl exc P S A O H B 59 Ser 4 w Cool Pack 8 cyl 59 Ser 5 exc P S 59 Ser 7 348 58 59 Ser 8 9 10 exc 322 Air Equip 60 62 All w Cool Pack 8 cyl exc PULLEY double 6 0 D Air Equip painted black 3747479 1 2 76 58 59 ALL w Air Equip 348 PULLEY front stamped 3743851 3743851 1 2 35 60 61 ALL w Cool Pack 6 cyl 62 ALL w Cool Pack 6 cyl exc P S PULLEY single stamped 3772886 3772886 1 3 00 60 61 Ser 60 Air Equip w Cool Pack 8 cyl PULLEY double stamped 3771861 3771861 1 2 70 60 62 Ser 60 Air Equip w Cool Pack PULLEY front single stamped 6 y1 3772127 3772127 1 2 65 60 62 Ser 60 P S w Cool Pack 6 cyl PULLEY front double stamped 3772885 3775674 1 3 39 60 64 ALL w Air Equip 8 cyl exc PULLEY front single stamped Cool Pack 3765947 3765947 1 2 45 62 63 Ser 60 Air Equip w Cool Pack 8 cyl PULLEY double 3828936 1 2 80 62 66 ALL 159 212 PULLEY double 5 O D 5116484l 1 12 89 62 66 Ser 60 212 PULLEY balancer shaft cast 5121095 512109 Sl 1 6 55 62 66 Ser 80 318 PULLEY cast 5109638 5 O D 5109638l 1 14 37 62 66 Ser 80 318 PULLEY camshaft balancer 5121109l 2 7 49 63 66 Ser 50 230 250 PULLEY front stamped 3790337 3790337 1 2 02 63 64 Ser 60 w Air Equip 292 PULLEY front stamped 3824448 3824448 1 2 35 63 64 Ser 50 w Cool Pack C Deluxe PULLEY 3834562 1 7 90 63 64 Ser 50 60 w Cool Pack 292 exc Air Equip PULLEY front 3827819 1 3 55 I9 0 659 102 Chevrolet Motor Divisig HDT General Motors Corporation REVISED MAY 1 1966