69 70 Ser 40 350 exc L P Gas 69 Ser 50 350 exc L P Gas 3958607 1 66 10 w studs Note 5 6 7 NOTE 5 Extreme care should be exercised when selecting replacement Inlet and Exhaust Valves for 1963 Ser 60 327 cu in Engines Approximately 1200 Cylinder Heads were used in production which have one 1 or more 003 O S Valves These Cylinder Heads may be identified by the numeral 3 stamped directly below the casting number NOTE 6 On 1957 1959 models it will be necessary to use 1 3850049 valve rocker cover unit NOTE 7 RH only for 1969 70 application 59 61 All 348 3815856 2 65 60 w valve rocker studs ldent No 3815857 60 66 Ser 50 283 67 Ser 40 283 68 All 307 3958602 2 63 65 w valve rocker studs 62 64 Ser 60 4 53 5197960 1 204 02 62 64 Ser 80 6V 53 5197951 2 175 97 62 65 All 348 409 3820640 2 76 75 w valve rocker studs Ident No 3819333 Note 8 NOTE 8 Exhaust Valve Rotator 3819334 is used with this Head Assy in late 1962 production When using this Head Assy as replacement on early 1962 production models the old Exhaust Valve Rotator 3735275 can be used but Valve Spring Shim 3764539 must be used to obtain the correct valve spring height 63 69 All 230 250 292 3938931 1 69 90 w studs 65 66 All D351 2455610 2 128 60 less valves 65 66 All D DH478 2454137 2 140 50 less valves 65 66 All D351 2455609 2 200 00 w valves 65 68 All D DH478 2454136 2 221 50 w valves 65 67 All 3 53 6V 53 5198203A R 196 00 65 69 All 4 53 5198202 1 227 25 66 70 All 366 exc L P Gas 3917218 2 70 75 w guide insert cylinder and exhaust valve Note 9 10 NOTE 9 When using on models prior to 1968 use pipe plug 444667 or 444746 to plug water temp switch hole NOTE 10 Pipe plug 444746 is to be discarded when water temp switch is mounted in cylinder head 68 70 All 427 3937729 2 73 05 w guide insert cylinder and exhaust valve 69 Ser 50 350 exc L P Gas 69 70 Ser 40 350 exc L P Gas 3958605 L H 63 65 L H w studs 69 Ser 40 50 w L P Gas 6 cyl 3958609 1 88 00 w studs 69 70 Ser 40 50 w L P Gas 350 3958600 2 74 15 w studs 69 70 All w L P Gas 366 3942458 2 75 90 w guide insert cylinder and exhaust valve 69 Ser 50 w Air Brake 8 cyl exc Tilt 3981881 R H 67 35 70 All 6 cyl exc L P Gas 3977568 1 71 25 w studs 70 All w L P Gas 6 cyl 3977569 1 87 60 w inserts studs cyl valve 70 Ser 50 350 exc L P Gas 3977625 2 67 35 w studs 0 283 GUIDE Inlet and Exhaust Valve Stem 38 40 All 3688759 6 70 exhaust 2 ength straight sides Note 1 NOTE 1 Must be used with valve spring seat 838539 41 62 All 6 cyl exc Diesel 3708168 6 80 inlet I D x Vie O D Note 2 41 62 All 6 cyl exc Diesel 3688761 6 80 exhaust 27m length straight sides Note 2 NOTE 2 To obtain proper valve stem clearance guides must be finished with 343 hand reamer after installation in cylinder head 56 59 All 322 1362589 16 95 inlet and exhaust non precision type ream in place yan X Ve X 27 qu long 62 69 All 3 53 4 53 6V 53 5116120A R 62 0 289 GASKET RlNG Cylinder Head 38 49 All 50 53 All 216 3835465 1 2 70 I 50 52 All 235 3835562 1 2 80 53 62 All 235 55 62 All 235 3701296 1 2 75 27V 0 L 55 70 All 265 283 327 350 3830711 2 1 45 19V O L Via dia hole 55 58 All 261 3750625 1 2 95 27V 0 L 58 61 All 348 3758383 2 1 30 20 O L 59 62 All 261 3760990 1 2 95 27V O L 62 65 All 348 409 3814003 2 1 30 20 O L 62 69 All 3 53 4 53 6V 53 51 16242 A R 05 water hole cover 63 All 230 1st design 3825562 1 1 10 28 O L 63 70 All 230 250 292 2nd design 3901016 1 2 95 28 O L stamped 3901016 65 66 All D351 2453449 2 4 10 65 69 All D DH478 663683 2 18 30 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATlON P A 31S 0 269 0 289 0 14 REV 6 71