55 64 Pass 8 cyl exc 348 409 3843359 16 inlet and exhaust O stamped on inside of pad end RPO Z11 3732765 16 inlet and exhaust 59 62 Pass 6 cyl 3764489 3 inlet left ldent No 3764485 cast 59 62 Pass 6 cyl 3764490 3 inlet right ldent No 3764486 cast 59 62 Pass 6 cyl 3764481 3 exhaust left ldent No 3764487 cast 59 62 Pass 6 cyl 3764482 3 exhaust right ldent No 3764488 cast A 63 64 Pass exc 8 cyl 5723551 A R inlet and exhaust 63 Spt Cpe RPO Z11 3840104 16 inlet and exhaust B stamped on inside of pad end 0 349 SUPPORT Valve Rocker Arm Shaft 50 53 Pass 235 3835520 6 ldent No 3835520 54 62 Pass 6 cyl 3783230 6 ldent No 3783230 or 3836114 0 352 SHAFT UNIT Valve Rocker 41 49 Pass 609924 1 w arms Note 1 NOTE 1 Contains 1 frt and 1 rear rocker shaft 1 L H and 1 R H inlet valve arm assy 1 rocker shaft oil connector assy 2 rocker cover studs 2 Wis washers 2 24 nuts 2 arm tension springs and 2 rocker cover insulators 50 58 Pass 6 cyl 3729191 1 w arms Note 2 NOTE 2 Contains 1 frt and 1 rear valve rocker shaft 1 L H and 1 R H inlet valve rocker arm assy 2 insulators 2 springs and 2 washers 0 353 SHAFT Valve Rocker Arm with Plug see group 1 531 for Fittings 40 62 Pass 6 cyl 3836138 2 2 grooves on plug end Note 1 NOTE 1 When used on models prior to 1954 four 9411925 Bolts and two 3835659 Studs are required 0 356 PLUG Valve Rocker Shaft 38 62 Pass 6 cyl 835560 2 Vis O D cup shaped 0 366 BOLT Valve Rocker Shaft Support also see group 0 413 38 53 Pass 3835837 4 16 x 3 6 w shoulder 54 62 Pass 6 cyl 9411925 A R 16 x 3 6 w o shou der 8 900 0 376 SPRING Valve Rocker Shaft 38 64 Pass 6 cyl 3835508 4 2 6 free length 38 62 Pass 6 cyl 837253 4 VIE free length 38 62 Pass 6 cyl 355936 A R retainer hairpin 1 ength 0 837 0 386 COVER GROMMET Valve Rocker Arm 38 53 Pass 3686784 1 w oil filler hole and air vent 54 62 Pass 6 cyl 3758661 1 27 O L Note 2 NOTE 2 When using on models with closed vent system it will be necessary to use 1552232 oil filler cap assy and drill hole for hose connector 55 59 Pass 8 cyl exc 348 3726086 2 cast aluminum 10 outer hole spacing 62 64 Pass 327 exc Sp H Per F l 3910298 2 COVER ASSY right or left 63 64 Pass 6 cyl 3980229 1 COVER ASSY 58 62 Pass 348 409 3853411 2 COVER UNIT right or left 59 64 Pass 283 3850049 2 COVER UNIT right or left 8 outer hole spacing Note 3 NOTE 3 Includes Cover Assy Gasket and 2 Cylinder Head Bolts 63 64 Pass 409 exc H Per dual 4BC 63 64 Pass w H Per dual 4BC 409 exc RPO Z11 3853413 2 COVER UNIT right or left chrome 64 Pass 3894337 1 GROMMET cover to A CL 6 I D x IV32 O D Note 4 6 1 745 NOTE 4 May be used with or without closed vent NOTE 6 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 0 413 BOLT INSULATOR RElNFORCEMENT STUD Valve Rocker Cover and Support also see group 0 366 54 64 Pass 180016 1 V4 20 x Vz 8 900 38 53 Pass 839083 2 INSULATOR rubber V2 I D x Va O D 54 64 Pass 3877670 A R REINFORCEMENT 1Vz 0 L Note 1 NOTE 1 Use with Bolt 180016 38 53 Pass 3835659 2 STUD 16 24 x 5 V 2 w support 0 423 GASKET Valve Rocker Cover 38 53 Pass 3694248 1 cork Via thick 38 53 Pass 3696781 1 cork V4 thick 54 62 Pass 6 cyl 3708646 1 cork 2 thick 54 62 Pass 6 cyl 3708648 1 cork V4 thick 1 1970 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 30 0 11 0 333 0 423