1 400 ENGINE ASSEMBLY 0 423 GASKET Valve Rocker Cover 70 72 All w ZBC 400 73 75 All 400 4 3933964 2 2 00 70 71 All w 4BC 400 3860315 2 2 00 21 0 L x 6 Ic wide 6 tabs 0 426 ROD Valve Push 70 72 All w 2BC 400 73 75 All 400 3796243A R 2 35 7 n O L blue stripe Note 1 2 NOTE I L 0 or mar rad and to be at valve rackar arm NOTE 2 May have one black stripe at each and 70 71 All w 4BC 400 lst design 3946067 8 1 90 inlet 8 az 0 L dia 70 71 All w 4BC 400 1st design 3946069 8 1 90 exhaust 9 n 0 L dia 71 All w 4BC 400 2nd design 346280 8 1 40 inlet 8 n 0 L M dia 71 All w 4BC 400 2nd design 346282 8 1 40 exhaust 9 n 0 L 1 dia repl 3904377 0 429 BALL NUT STUD Valve Push Rod Adjusting I 70 71 All w 4BC 400 3899622 16 45 M dia valve rocker arm 70 75 All 400 3959142A R 42 dia 70 71 All w 4BC 400 3896648 16 24 NUT valve rocker arm hex Ik 20 cad 71 72 All w 280 400 73 75 All 400 374434I A R 24 NUT 24 70 72 All w ZBC 400 73 75 All 400 3814692 16 59 STUD valve rocker arm ball 003 0 5 light blue paint 70 71 All w 4BC 400 3921912 16 64 STUD valve rocker arm ball Note 1 71 72 All w 2BC 400 73 75 All 400 3815892A R 59 STUD 24 x 2 013 0 5 NOTE I When using 3921972 in place af 7 904396 an a um num head It is mandatory I0 nsra 452715 re icnfL 0 439 GUIDE Valve Push Rod 70 71 All w 4BC 400 1st design 3860038 8 79 2 holes end 2 U slots 71 All w 4BC 400 2nd design 3904378 8 71 0 459 TAPPET Valve or Lifter 70 72 All w 4BC 400 5232700 16 N L 70 72 All w 2BC 400 73 75 All 400 exc Police 5232670 16 N L 73 75 Police 400 5232720 16 4 63 0 519 CAMSHAFT Engine NOTE Eng ne Camshaft Brea n 0 705080lZ Group 1 85LZ 9 wu d be used when nsta ing new camshafts 70 72 All w 2BC 400 exc NB 2 73 All 400 74 All 400 exc NB Z 75 All 400 3896929 1 53 50 standard ident No 3895930 70 All w 4BC 400 3874872 1 59 25 ldent Nc 3874874 71 All w 4BC 400 3963544 1 67 75 ident No 3963545 72 All w NB 2 400 74 All w NB Z 400 8998952 1 53 50 0 539 BEARING Camshaft Front or No 1 70 72 All w ZBC 400 73 75 All 400 3723584 1 2 65 precision type stamped 1 70 71 All w 486 400 3967808 1 2 80 precision type stamped 1 0 543 BEARING Camshaft No 2 Front Intermediate 70 72 All w 286 400 73 75 All 400 3723585 1 2X65 precision type stamped 2 70 71 All vv 4BC 400 3967810 I 2 80 precision type stamped 2 0 546 BEARING Camshaft Center and Rear Intermediate 70 72 All w 2BC 400 73 75 All 400 3723586A R 2 65 stamped 3 and 4 70 71 All w 48C 400 3967809 Z 2 80 center and rear inter stamped 3 4 0 549 BEARING Camshaft Rear 70 72 All w 286 400 73 75 All 400 3723585 1 2 65 precision type stamped 2 0 543 70 71 All w 480 400 3967810 2 2 80 preclslbn type stamped 2 0 543 0 553 PLUG Camshaft Bearing Hole cup type ln cylinder block 70 71 All w 480 400 3859926 1 24 steel Z n dia x 1 thk 71 All w 2BC 400 1st design 3704158 1 24 rear brg GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 11 REV 4 77 0 ua 0 423 0 553 r