1946 70 ENGINE ASSEMBLIES 0 269 HEAD Cylinder C0n t 65 67 All 3 53 6V 53 5198203A R I 65 69 All 4 53 5198202 1 66 70 All 366 exc L P Gas 3917218 2 w guide insert cylinder and exhaust valve Note 9 10 68 70 All 427 3937729 2 w guide insert cylinder and exhaust valve 69 Ser 50 350 exc L P Gas 3 69 70 Ser 40 350 exc L P Gas 3958605 L H L H w studs 69 70 Ser 40 50 w L P Gas 350 3958600 2 w studs 69 70 All w L P Gas 366 3942458 2 w guide insert cylinder and exhaust valve 69 Ser 50 w Air Brake 8 cyl exc Tilt 3981881 R H 70 Ser 50 350 exc L P Gas 3977625 2 w studs 0 283 GUIDE Inlet and Exhaust Valve Stem NOTE 1 To obtain proper valve stem clearance guides must be finished with 343 hand reamer after installation in cylinder head i il 41 62 All 6 cyl exc Diesel 3708168 6 inlet l D x u O D Note 1 41 62 All 6 cyl exc Diesel 3688761 6 exhaust 2 w length straight sides Note 1 56 59 All 322 1362589 16 inlet and exhaust non precision type ream in place l D x O D x 2 4 long 62 69 All 3 53 4 53 6V 53 5131961 A R 0 289 GASKET RING Cylinder Head NOTE 1 Unit consists of gaskets for cylinder heads rocker covers intake and exhaust manifolds carburetor distributor air cleaner water outlet and va ve stem oil seals NOTE 2 Units consist of cyl head rocker cover push rod cover manifold thermostathousing and water out et gaskets exhaust pipe packing and valve stem oil seals NOTE 3 When using on jobs after 1956 it is also necessary to use 3731062 exhaust pipe sealing ring e discard 3692831 exhaust pipe flange gasket NOTE 4 It may be necessary to cut out the center ribs from exhaust port opening of inlet exhaust manifold gasket V NOTE 5 It may be necessary to cut off the six 6 locating tabs of the valve rocker cover gasket NOTE 6 Unit consists of 2 cy inder head gaskets 2 valve rocker cover gaskets 1 inlet manifold front rear Fl H L H side gaskets 1 exhaust manifold valve gasket 1 water outlet gasket 1 ignition timer distributor gasket 2 exhaust pipe packings and 16 valve stem oil seals NOTE 7 Unit also includes 1 exhaust pipe flange gasket and 6 push rod cover seals NOTE 8 Unit also includes 1 exhaust pipe flange gasket I I NOTE 9 Unit also includes 1 therm by pass elbow gasket 2 air cleaner to carburetor gaskets 2 carb gasket and 2 exh pipe rings NOTE 10 Unit consists of 2 cylinder head gaskets 2 valve rocker cover gaskets 8 manifold gaskets 4 water outlet gaskets 1 ignition timer distributor gasket 2 exh pipe packings 1 heat valve gasket and 1 therm by pass elbow A 53 62 All 235 55 62 All 235 3701296 1 27 O L 55 70 All 265 283 327 350 3830711 2 19 z O L dia hole 55 58 All 261 3750625 1 27 O L 59 62 All 261 3760990 1 27 O L 82 65 All 348 409 3814003 2 20 O L I 62 69 All 3 53 4 53 6V 53 5116242A R water hole cover 63 70 All 230 250 292 355754 1 28 O L stamped 3901016 65 66 All D351 2453449 2 66 70 All 366 3872798 2 22 az O L 68 All 307 L 3995633 2 68 70 All 427 3921940 2 38 49 All 50 53 All 216 3691929 1 GASKET UNIT Note 2 7 50 52 All 235 3707038 2 GASKET UNIT Note 2 8 55 56 Ser 4 5 6 265 1st design 3711846 1 GASKET UNIT Note 1 Q 55 62 All 235 3709428 1 GASKET UNIT Note 2 8 55 58 All 261 3751893 1 GASKET UNIT Note 2 3 8 57 58 All 283 exc L D 59 68 All 283 327 3931606 1 GASKET UNIT Note 6 58 65 All 348 409 3825191 1 GASKET UNIT Note 1 59 62 All 261 I 3764410 1 GASKET UNIT Note 2 I 63 66 Ser 50 230 250 87 70 Ser 40 250 345030 1 GASKET UNIT Note 2 4 63 66 Ser 50 60 292 67 70 All 292 3 45029 1 l GASKET UNIT Note 2 5 66 70 All 366 exc L P Gas 465396 1 GASKET UNIT Note 6 9 68 70 All 427 6259319 1 GASKET UNIT Note 10 68 All 307 3931595 1 GASKET UNIT Note 6 69 70 All w L P Gas 366 465398 1 GASKET UNIT Note 6 3 69 70 All w L P Gas 350 3957997 1 GASKET UNIT Note 6 t j GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TMY 0 269 0 289 I 0 12 REV 5 79