CHASSlS ELECTRICAL SYSTEM 2 270 PLUG Spark Con t 56 58 All 59 All exc 348 60 62 Ser 60 exc 348 63 64 Ser 60 327 5612140A R standard plug AC 42 1 14MM 49 55 2 Ton 1st Ser 54 55 1 Ton exc H D 1st Ser 55 Ser 4 5 6 56 58 All 64 65 Ser 60 327 A 67 68 Ser 50 60 327 5612002A R 2 step cold plug C 43 14MM 49 54 All 55 Ser 4 5 56 59 Ser 4 60 Ser 40 50 63 66 Ser 50 8 cyl 67 68 Ser 40 283 307 1559492A R standard plug AC 44 14 MM Note 1 49 54 All 55 Ser 4 5 56 59 Ser 4 4 60 Ser 40 50 63 66 Ser 50 8 cyl 67 68 Ser 40 283 307 5612386A R 1 2 step hot plug extended shield AC 44S 14 MM 58 66 All 348 366 409 63 Ser 50 60 292 67 68 Ser 50 60 366 68 All 427 5612235 A R standard plug long reach water cooling C 42N 14 MM 58 59 All 348 60 61 Ser 70 80 5612241 A R 1 step hot long reach water cooling AC 43N 14 MM 63 66 Ser 50 230 250 67 68 Ser 40 250 5612630A R standard plug AC 46N 14 MM 64 66 Ser 50 60 292 67 68 Ser 40 thru 60 292 5612791 A R normal service AC C44N 69 All 250 5612826A Fl normal service AC R46N 69 70 All 350 5569901 A R normal service AC CR43 69 Ser 40 50 292 5613313A R normal service AC CR44N 69 70 Ser 50 60 366 427 5612756 A R std AC CR42N 70 All w L P Gas 250 70 72 All 292 71 72 All 350 5613355 6 AC Fl44T 70 All 250 exc L P Gas 5613357 6 AC Fl46T 71 72 All 250 4 70 Tilt 350 5569993 8 AC R44 71 72 All 427 5613353 8 AC R 42T 71 72 All 366 5613354 8 AC R43T 2 271 GASKET Spark Plug Seat I NOTE 7 Ream or remove internal projections when using on long reach plugs 38 70 All 5612328A R IG l D x u 0 D 14 MM chrome w retention dimple Note 1 38 70 All 1555475 A R 14 MM chrome less retention dimple 41 48 All 1555492 6 g2 I D x ia 0 D 10 MM copper 2 273 WRENCH Spark Plug 4 V 55 60 All 3708444 1 ls hex 4 long 2 274 PULLEY FAN Generator NOTE ln some cases double groove pulleys may be used in place of single groove pulleys Outside Shaft Groove Fan Dia Dia No Width Stamped 38 All exc EB EC Q HC HD HE T 39 52 All exc large gen 1952 Yes 3 1 5 597667 1 55 57 Ser 4 P S w 30 35 amp 12 volt 55 57 Ser 5 6 7 8 P S w 30 amp 6 cyl 59 Ser 4 6 w 40 amp 6 cyl 59 Ser 7 w 40 amp 283 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM REV 5 79 2 13 2 270 2 274 ji r7 riwrAH 7