1946 70 ENGINE ASSEMBLIES 0 033 BLOCK ASSEMBLY Cylinder A UNIT Conversion NOTE 1 A plug above the oil filter inlet hole must be driven in so it is 63 below surface of boss when a full flow oil filter is to be used NOTE 2 Remove pilot bearing from crankshaft before installing on Automatic Q NOTE 3 When using on early 1958 design models without spark plug cooling it will be necessary to use 2 3814003 Cylinder Head Gaskets 2 3815856 Cylinder Heads 8 5612235 Spark Plugs 1 3756628 Tube Assy 1 3774029 Stud 1 120376 Nut and 1 138485 Lockwasher used to attach exhaust manifold and oil level gauge Tube Assy NOTE 4 1955 model initial installation requires conversion kit NOTE 5 Cyl head gasket 3814003 must be used with this block NOTE 6 Does not include pistons pins rings or bearings other than camshaft bearing NOTE 7 May contain Nodular Iron type crankshaft lt is necessary to install a harmonic balancer on vehicles which do not have an existing ba ancer NOTE 8 1967 engines with date stamp FO619 thru end of production incorporate 1968 parts as follows Crankshaft Rear Bearing Oil Seal Rear Bearing Cap and Oil Pan Gasket Refer to proper parts in their Groups NOTE 9 When using on models prior to 1968 it is necessary to transfer No 5 RH Bearing Cap Stud from replaced engine NOTE 10 When using on models prior to 1968 it is necessary to use the 1968 Oil Pan Gasket Unit NOTE 1 1 When using on 1968 and past models it is necessary to install Dist Drive Gear 1971970 with Drive Pin 1908031 on Dist being transferred from replaced engine NOTE 12 When using on 1968 and past models it is necessary to remove the two dowel pins from front of case when transferring front end cover from replaced engine NOTE 13 When using on 1966 67 models it is necessary to use 3928934 Dist Inter Shaft Assy NOTE 14 When using on models prior to 1968 it will be necessary to use 1968 oil pan gasket unit PARTIAL ENGINE 57 59 Ser 4 8 cyl 59 Ser 6 w L D 283 60 61 Ser 40 283 62 Ser 40 50 283 3970172 1 cast 3849852 Note 2 7 62 67 All 327 3970160 1 62 66 Ser 80 6V 53 5128025 1 engine frt upper 63 65 All 230 3930966 1 Note 14 63 70 All 292 exc L P Gas 358826 1 Note 2 8 10 65 67 All 3 53 5196490 1 66 Ser 50 250 67 Ser 40 250 68 70 All 250 exc L P Gas 374853 1 Note 8 66 70 All 366 exc L P Gas 6272183 1 See Note 11 13 68 70 All 427 6272187 1 See Note 11 68 All 307 3970652 1 68 All 327 3970656 1 Note 2 69 70 Ser 40 50 350 exc L P Gas 3970659 1 69 70 Ser 40 w L P Gas 350 344485 1 FITTED CYLINDER BLOCK includes pistons pins rings and bearings 62 69 All 4 53 5196491 1 Note 6 62 66 Ser 80 6V 53 5196821 1 Note 6 63 65 Ser 50 230 3930967 1 I 63 67 Ser 50 60 292 67 Ser 40 292 68 70 Ser 40 thru 60 292 358819 1 Note 8 9 10 66 Ser 50 250 67 Ser 40 250 68 70 All 250 374210 1 Note 8 66 70 All 366 exc L P Gas 360947 1 See Note 12 13 68 70 All 427 6272181 1 See Note 12 68 All 327 3970646 1 69 70 Ser 40 250 w L P Gas 3958677 1 69 70 Ser 40 50 292 w L P Gas 358819 1 69 70 Ser 40 50 350 exc L P Gas 3970649 1 69 70 Ser 40 50 350 w L P Gas 3970648 1 70 All w L P Gas 366 462868 1 0 034 EXPANSION PLUGS CLIP COVER TUBE ASSY Cylinder Block also see 8 970 All All 838538 8 water jacket balance shaft hole cup shape 1 O D 38 70 All 6 cyl 3835577 A R oil press pipe in block O D cup shape 55 59 All 6 cyl 3835121 A R frt and rear in block 2 in 3 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 72TM 0 033 0 034 0 a REV 5 79