CHASSIS ELECTRICAL SYSTEM 2 251 SUPPORT RETAINER GROMMET SHIELD CLIP Spark Plug Wire C0n t 66 67 Corvette 396 427 3871266 8 70 SHIELD v 4 68 71 Corvette 8 cyl exc 396 427 454 AM FM Radio 72 75 Corvette 350 3919807 1 58 SHIELD left front 73 74 Corvette 454 336716 8 26 SHIELD heat 69 70 Corvette w A M FM radio 3973609 1 2 78 SHIELD ASSY radio ign frt 69 70 Corvette w A M F l 1 radio 3973610 1 2 78 SHIELD ASSY radio ign rear t 58 3 1 Corvette 283 327 350 65 75 Corvette 3744409 2 15 CLIP 2 wide 0ne M h0le spIg wire to oil pan 1 2 257 TERMINAL CLIP Spark Plug Wire 53 55 Corvette 6 volt 454631 A R 07 spade end for is rod Packard 208 A 53 55 Corvette 6 volt 5284618 8 03 CLIP high tension Packard 202 2 258 NIPPLE PROTECTOR Spark Plug Wire 53 69 Corvette 5289527 A R 10 distributor plastic 13 is long 53 69 Corvette 6 cyl 5297132 6 39 PROTECTOR bellows type Packard 286 2 270 PLUG Spark RECOMMENDED SERVICE 57 59 Corvette 60 Corvette w F l 1559494A R 1 50 city type oper AC 46 14 MM Note 1 57 59 Corvette 60 Corvette w F I 5612390 A R 1 50 city type oper extended shield AC 468 14 MM Note 1 58 59 Corvette 5612140A R 1 50 continuous high speed AC 42 1 14 MM Note 1 53 55 Corvette 69 70 Corvette w Sp H Per 350 5569992A R 1 80 radio suppression type AC R43 14 MM 56 Corvette cold plug H D operation 59 75 Corvette 283 exc F l 62 68 Corvette 327 standard plug 58 59 Corvette 1559492A R 1 50 town and country AC 44 14 MM Note 1 56 Corvette cold plug H D operation 60 Corvette 283 exc F I 58 59 Corvette 62 68 Corvette 327 exc H Per Sp H Per F i 5612386A R 1 50 town and country extended shield AC 445 14 MM Note 1 57 59 Corvette 5612002A R 1 50 cold plug H D operation AC 43 14 MM Note 1 i 56 59 Corvette 1559493 A R 1 50 hot plug continuous city oper AC 45 14 MM 56 59 Corvette 5612371 A R 1 50 hot plug continuous city oper extended shield AC 455 14 MM i 64 68 Corvette 396 427 5612241 A R 1 50 hot plug city type dirving AC 43N 14 MM 66 69 Corvette 427 5613312 8 1 80 normal service w aluminum cyl head only AC R43XL S9 70 Corvette 350 exc Sp H Per 5569993A Fl 1 80 AC R 44 69 Corvette w H Per Sp l l Per 396 427 5612425 8 1 80 hotplug AC R43N 70 Corvette 454 exc l l D 71 Corvette w Sp H Per 350 71 Corvette 454 exc Sp H Per 5613354 8 1 80 AC R43T 71 Corvette 350 exc Sp H Per 72 74 Corvette 5613355 8 1 80 AC R44T 5 All 5613572 1 AC R44TX When individual driving conditions warrant different heat range plugs may be used by selecting higher type Nos for hotter and lower type Nos for colder plugs as necessary NO TE 7 May be used on previous models using 74 V l l plugs not equipped with boots 2 271 GASKET Spark Plug Seat 53 64 Corvette 5612328A R 02 9 6 l D x 5 2 0 0 14 l IM chrome w retention dimple Note 1 NOTE 7 Heam or remove internal projections when using on long reach plugs 53 71 Corvette 1555475A R 02 14 MM chrome less retention dimple 2 273 WRENCH Spark Plug 53 72 Corvette 3708444 1 73 3 ia hex 4 length 1974 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET P A 30B 1 2 251 2 273 2 8 REV 9 74