427 ENGINE ASSEMBLY 0 386 COVER ASSY GROMMET Valve Rocker Arm Con t 69 69 All w p4 H Per 8 5 Equip 427 4 325169 L H 21 80 chrome 4 66 69 All 427 3894337 1 13 GROMMET cover to a cl 4D x 1 O D 1 745 Note 1 2 NOTE I May be used with or without closed vent NOTE 2 When using on closed vent equrbped vehicles lt wi be necessary to remove center from grommet to permit assembling af fresh air cannectar into side of cavern 0 413 BOLT REINFORCEMENT Valve Rocker Cover and Support 66 69 All 427 4 4 4 4 4 180015 I 08 20 x H 8 900 444 4 44 44 65 69 All 427 4 3877670A R 14 REINFORCEMENT 1 0 L Nota 1 NOTE I Use Mtn bn t IBOUIE 0 423 GASKET Valve Rocker Cover 56 69 All 427 4 4 3860315 2 2 00 21 0 L x G i wide 6 tabs 0 426 ROD Valve Push 56 All 427 67 All 427 2nd design exc Sp H Par4 67 69 All w Sp H Per 427 68 69 Police 427 4 3946067 8 1 90 inlet 8 sg 0 L 66 All 427 67 All 427 2nd design exc Sp4 H Per 67 69 All w Sp H Per 427 68 69 Police 427 4 3946059 8 1 90 exhaust 9 0 L Note 1 67 All 427 1st design exo Sp H Pan 69 All 427 exc H Per Sp H Per Police 4 346282 8 1 40 exhaust 9 M 0 L Note 1 67 All 427 lst design exc Sp H Per 69 All 427 exc H Per Sp4 H Per Police 4 4 346280 8 1440 inlet 8 0 L Note 1 4 4 4 NOTE 1 Ist des gn engines will be hul t prior to 9 I 66 and will be Identil7ed an the engine etemn pad by T08 p us the day built 0 429 BALL NUT STUD Valve Push Red Adjusting 66 69 All 427 4 4 44 44 4 3899622 16 45 u dia valve rocker arm 4444 444 444 66 69 All 427 4 I 3996846 16 24 NUT valve rocker arm hex lk 20 cad4 4 4 4 66 69 All 427 4 44 4 4 3921912 16 64 STUD valve rocker arm ball Note 1 44 NOTE I I I hen using 392 l9 I2 ln place of 3904396 on a umlnurn heaal it ls mandatory to Install 4527 76 lrelicoii 0 439 GUIDE Valve Push Rod 56 All 427 67 All 427 2nd design exc Sp H Per4 67 All vv Sp4 H Per 427 58 69 All 427 4 44 4 3860038 8 79 Z holes and 2 U slate Note 1 67 All 427 1st design exc Sp H Per4 69 All 427 exc Police H Per44 Sp H Per 4 3904378 8 71 lt push rod slot sa thick Note 1 NOTE I Ist design engines wi I he built pdor to 9 766 and w I be identiHed on the engine stani 1 had by TO8 plus the day built 0 459 TAPPET Valve or Lifter 6669 All w Sp H Far 427 4 4 5232695 16 N L mechanical type Z 0 L4 X n 040 4 4 66 69 All 427 exc Sp H Per4 4 5232700 XR N L 0 619 CAMSHAFT Engine NOTE Engine Camshaft Break n 0 I 05080CL Group I 85tZ should be used when Insta ling new cams rafts 66 69 All w Sp H Per 427 4 3863143 1 67 75 ident N0 3863I43 4 4 69 All 427 exc4 H Per4 Sp H Per4 4 3974972 1 59 25 ident Nu 3874874 4 4 44 6668 All 427 exc Sp H Fer 69 All w H Par 427 3883988 1 67 75 0 539 BEARING Camshaft Front or N0 1 K 66 69 All 427 4 4 3967806 I 2 80 precision type stamped 1 4 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 11 0 386 0 539 0 use REV 4 77