427 ENGINE ASSEMBLY 0 386 COVER GROMMET Valve Rocker Arm Con t NOTE 2 When using on closed vent equipped vehicles it will be necessary to remove center from grommet to permit assembling of fresh air connector into side of cover 66 All 427 67 All 427 exc Sp H Per A I R 68 69 All 427 exc S S Sp H Per 338262 R H 19 60 painted 66 69 All 427 exc Sp H Per 338261 L H 19 55 painted 67 All w Sp H Per 427 exc A I R 68 69 All 427 325174 R H 32 75 chrome 67 All w Sp H Per 427 3908923 L H 36 00 chrome aluminum head 67 All w Sp H Per A R 427 3902390 R H 36 00 chrome plate w aluminum head 68 69 All w Sp H Per S S Equip 427 325169 L H 34 50 COVER chrome 66 69 All 427 3894337 1 23 GROMMET cover to a cl 5 is l D x 1 gz 0 D 1 745 Note 1 2 0 413 BOLT REINFORCEMENT Valve Rocker Cover and Support NOTE 1 Use with bolt 780076 66 69 All 427 180016 1 20 BOLT 4 20 x Z 8 900 66 69 All 427 3877670 A R 19 REINFORCEMENT 1 0 L Note 1 0 423 GASKET Valve Rocker Cover 66 69 All 427 3860315 2 N L GASKET 21 gz O L x 6 IG wide 6 tabs 0 426 ROD Valve Push NOTE 7 7st design engines will be built prior to 9 1 66 and will be identified on the engine stamp pad by T08 plus the day built 66 All 427 67 All 427 2nd design exc Sp H Per 67 69 All w Sp H Per 427 68 69 Police 427 3946067 8 3 05 inlet 87 gz 0 L 66 All 427 67 All 427 2nd design exc Sp H Per 67 69 All w Sp H Per 427 68 69 Police 427 3946069 8 3 05 exhaust 93 IG O L Note 1 67 All 427 lst design exc Sp H Per 69 All 427 exc H Per Sp H Per Police 346282 8 2 20 exhaust 93 is O L Note 1 67 All 427 1st design exc Sp H Per 69 All 427 exc H Per Sp H Per Police 346280 8 2 20 ROD inlet 87 az O L Note 1 0 429 BALL NUT STUD Valve Push Rod Adjusting NOTE 7 When using 392 79 72 in place of 3904396 on aluminum head it is mandatory to install 4527 76 he icoi 66 69 All 427 3899622 16 69 BALL S4 dia valve rocker arm 66 69 All 427 3896648 16 41 NUT valve rocker arm hex lk 20 cad 66 69 All 427 3921912 16 96 STUD valve rocker arm ball Note 1 0 439 GUIDE Valve Push Rod NOTE 1 1st design engines will be built prior to 9 7 66 and will be identified on the engine stamp pad by TO8 plus the day built 66 All 427 67 All 427 2nd design exc Sp H Per 67 All w Sp H Per 427 68 69 All 427 3860038 8 1 55 2 holes and 2 U slots Note 1 67 All 427 1st design exc Sp H Per 69 All 427 exc Police H Per Sp l l Per 3904378 8 2 25 GUIDE 3 G push rod slot 3 gz thick Note 1 0 459 LIFTER Valve or Tappet 66 69 All w Sp H Per 427 5232695 16 N L mechanical type 2 O L x 7 gz O D 66 69 All 427 exc Sp H Per 5232700 A R N L LIFTER GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 11 REV 4 81 0 115 0 386 0 459