58 ALL 348 Ident No 3758021 3758742 2 48 25 59 61 ALL 348 W valve rocker studs Ident No N 3815857 3815856 2 48 50 60 64 Ser 50 283 w valve rocker studs Ident No wi 3814480 3817682 2 43 00 62 64 Ser 60 DIESEL Ident No 5121114 S19 37 1 188 64 62 64 Ser 80 DIESEL Ident No 5121113 5196036 2 162 71 62 64 ALL 348 409 w valve rocker studs Ident No 3819333 382 40 2 56 50 63 64 Ser 50 230 Ident No 382 37 379 84 1 54 50 63 ALL 292 ldent Nc 3799019 379 85 1 56 50 64 ALL 292 Ident No 3847990 384 27 1 54 50 NOTE 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 l more 003 O S Valves These Cylinder Heads may be identified by they numeral 3 stamped directly below the casting number NOTE 838539 Seat must be used on jobs w o hydraulic valve lifters NOTE On 1957 1959 models it will be necessary to use 1 3772668 valve rocker cover unit ANOTE When using 3773011 it will be necessary to use 3772668 valve rocker cover unit TNOTE On 1953 thru 1955 models with Bourdon tube typ heat indicator gauge it is also necessary to use Adapter Bush1ng 38 160 QNOTE When used on 1953 thru 1955 models valve rocker cover 3758661 and gasket 3708646 or 3708648 must be used Pierce vent slats in rocker cover or install cap 1552232 Install 2 9411925 valve rocker cover I shaft support bolts eNO 1 E Part 838539 is NOT required if replaced head has spring seats which can be transferred NOTE 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 I correct valve spring height 0 283 GUIDE lnlet and Exhaust Valve Stem S5 62 ALL 6 cyl exc DIESEL inlet I D x E O D 3708168T 6 70 55 62 ALL 6 cyl exc DIESEL exhaust 2 length straight sides 3688761T 6 65 56 59 ALL 322 inlet non precision type ream in place X I D x O D x 2 long 1165557 16 65 62 64 DIESEL 5116120 A R 54 NOTE Also used as exhaust valve stem guide TNOTE To obtain proper valve stem clearance guides must be finished with 343 hand reamer after installation in cylinder head 0 289 GASKET GASKET UNIT RING Cylinder Head 55 62 ALL 235 27 O L 3701296 1 2 20 55 64 ALL 265 283 327 19 0 L X dia hole 3830711 2 1 15 55 58 ALL 261 27 0 L 3750625 1 2 35 56 59 ALL 322 stamped 1165307 1165307 2 1 30 58 ALL 348 lst design 20 O L not used w spark plug cooling 3754081 2 1 00 S8 61 ALL 348 2nd design 20 O L used w spark plug cooling 3758383 2 1 00 59 62 ALL 261 27 O L 3760990 1 2 35 62 64 ALL 348 409 20 0 L 3814003 2 1 00 62 64 DIESEL water hole cover 5116242 A R 05 63 64 Ser 50 60 230 292 28 O L 3825562 1 75 55 56 Ser 4 5 6 265 lst design GASKET UNIT 3711846T 1 5 95 55 56 ALL 265 2nd desizu GASKET UNIT 3733879T 1 5 95 55 62 ALL 235 GASKET UNIT 3709428 1 4 70 55 58 ALL 261 GASKET UNIT 375l893 1 4 70 56 59 ALL 322 GASKET UNIT 1392707 5 1 8 15 59 Ser 4 6 w L D 283 60 61 Ser 40 S0 283 GASKET UNIT 3819423T 1 6 20 59 62 ALL 261 GASKET UNIT 3764410 1 4 70 58 61 ALL 348 GASKET UNIT 3798314T 1 6 20 57 59 ALL 283 exc L D 60 61 Ser 60 283 J 62 64 Ser 40 50 60 283 327 GASKET UNIT 3819424T 1 6 20 Chevrolet Meter ggrilsgott HDT 124 General Motors Corporation REVISED JANUARY 1 1964