68 70 All 396 3860095 1 1 90 3 O D stamped 3860095 67 70 All 3 53 5116224 1 4 09 crankshaft frt oil std 67 70 All 3 53 5116476 2 1 55 upper cover cam and bal oil 67 70 All 3 53 5198502 1 1 04 SLEEVE oil 0 253 lNSERT WASHER Exhaust Valve 67 70 All 3 53 5116361 A R 1 53 std Wu O D 67 70 All 3 53 5196752 A R 1 46 010 oversize 1 V O D stamped GM 10 0 269 HEAD Cylinder 50 52 All 235 3835908 1 79 35 w valve guides ldent No 3835909 53 62 All 235 63 4 WD 3836954 1 79 35 w valve guides Notes 1 2 3 4 NOTE 1 When used on 1953 55 models valve spring seat 838539 must be used NOTE 2 When used on Comm models with H T 18 hole must be drilled for oil cooler line NOTE 3 When used on 1953 thru 1955 models valve rocker cover 3758661 and gasket 3708646 or 3708648 must be used Pierce vent slots in rocker cover or install cap 1552232 Install 2 941 1925 valve rocker cover shaft support bolts 62 63 All 261 3836963 1 79 35 w valve guides Note 4 NOTE 4 On 1953 thru 1955 models with Bourdon tube type heat indicator gauge it is necessary to use special reducing Bushing 3837160 55 56 Ser 3 8 cyl 3773011 2 55 40 w valve rocker studs ldent No 3703523 Note 5 NOTE 5 When using 3773011 on above models it is necessary to use 3850049 valve rocker cover unit 57 62 All 265 283 65 70 All Blazer 307 327 3958602 2 68 75 w studs 63 67 All 283 3817680 2 59 20 right and left ldent No 3795896 63 69 All 230 250 292 3938931 1 75 50 w studs Note 6 64 65 All 194 66 67 Ser 10 D D G 10 194 3933094 1 74 00 w studs Note 6 NOTE 6 Pipe plug 444746 or 444788 is to be discarded when water temp switch is mounted in cylinder head 66 G 10 w A I R 194 3887861 1 69 45 w studs 67 70 All 3 53 5198203 1 196 00 68 All 396 3935404 1 80 40 w valve guide 69 All 396 3933146 2 85 95 w valve guide 69 All Blazer 350 exc L P Gas 3958605 2 68 75 w studs 69 All w L P Gas 6 cyl 3958609 1 95 05 w studs 69 70 All w L P Gas 350 3958600 2 74 15 w studs A 70 All Blazer 6 cyl exc L P Gas 3977568 1 76 95 w studs 70 All w L P Gas 6 cyl 3977569 1 94 60 w inserts studs cyl valve 70 All Blazer 350 exc L P Gas 3958606 2 68 75 w studs 70 All 396 3973195 2 91 55 w valve guide 0 283 GUIDE Inlet and Exhaust Valve Stem 38 40 All 3688759 6 70 exhaust 2 length straight sides Note 1 NOTE 1 Must be used in conjunction with valve spring seat 8238539 41 62 All 6 cyl 63 4 W D 6 cyl 1st Ser 3708168 6 80 inlet I D x 0 D Note 2 41 62 All 6 cyl 63 4WD 6 cyl lst Ser 3688761 6 80 exhaust ZVI 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 67 70 All 3 53 5116120A R 62 0 289 GASKET UNlT GASKET RlNG Cylinder Head 38 53 All 216 3691929 1 6 70 53 All 3707039 1 6 00 54 62 All 235 63 4 WD 235 3709428 1 6 00 55 56 All 8 cyl 3711846 1 7 60 Note 1 NOTE 1 When used on trucks use flange gasket 373328 l 57 68 All 265 283 327 3931606 1 8 15 Note 2 NOTE 2 When using this unit it will be necessary to purchase the air cleaner to carb gasket 62 63 All 261 3764410 1 6 25 Note 3 NOTE 3 When using this unit on 1962 models replace 3701777 water outlet gasket with 3765024 if not included in unit 63 65 All 153 3930963 1 5 90 63 70 All Blazer 230 250 3960191 1 8 60 Note 4 5 6 NOTE 4 On D D models it will be necessary to discard water outlet gasket 3701777 and replace it with 3789539 63 70 All 292 3960190 1 8 60 Note 5 64 67 Ser 10 D D G 10 194 3960192 1 8 30 Note 5 6 67 70 All 3 53 5196578 2 8 47 68 70 All 396 3997459 1 1 1 30 68 All 307 3931595 1 8 15 1971 CHEVROLET MOTOR DIVISION GENERAI MOTORS CORPORATl0N P A 31L j REV 6 71 0 9 0 21 3 0 289