59 Ser 6 w L D 283 83 66 Ser 50 283 exc Tilt 67 Ser 40 283 exc Tilt SBC D D 3937908 1 210 50 cast 3849852 58 65 All 348 3860387 1 263 00 cast 3857655 Note 3 5 62 67 All 327 3937289 1 254 50 62 65 All 409 3860386 1 292 75 cast 3857656 62 69 All 4 53 5196491 1 419 90 Note 6 62 66 Ser 80 6V 53 5196821 1 708 92 Note 6 63 65 Ser 50 230 3930967 1 183 10 63 67 Ser 50 60 292 67 Ser 40 292 V 68 70 Ser 40 thru 60 292 3930972 1 208 75 Note 8 9 10 65 66 All D351 2464852 1 649 30 65 69 All D DH478 2464853 1 694 50 66 Ser 50 250 67 Ser 40 250 68 70 All 250 3930969 1 190 00 Note 8 66 70 All 366 exc L P Gas 3970681 1 275 00 See Note 12 13 68 70 All 427 3970687 1 292 25 See Note 12 68 All 327 3961473 1 251 25 See Note 14 68 All 307 3970642 1 229 50 69 All 366 w L P Gas 3958652 1 282 25 69 70 Ser 40 250 w L P Gas 3958877 1 183 30 69 70 Ser 40 50 292 w L P Gas 3958678 1 202 00 69 70 Ser 40 50 350 exc L P Gas 3970649 1 282 25 69 70 Ser 40 50 350 w L P Gas 3970648 1 282 25 70 All w L P Gas 366 3970884 1 286 25 UNIT Conversion NOTE 2 Remove pilot bearing from crankshaft before installing on Automatic 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 3765004 as shown 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 It is necessary to install a harmonic balancer on vehicles which do not have an existing balancer 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 11 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 3961473 on 1968 model year it is mandatory to use 3957985 inlet manifold gasket unit NOTE 17 Use 1969 Inlet Manifold Gasket Unit 0 034 EXPANSION PLUGS CLIP COVER TUBE WASHER Cylinder Block also see 8 970 All All 838538 8 15 water jacket balance shaft hole cup shape 1 0 D 55 57 All 8 cyl exc 322 3704794 1 10 camshaft bearing hole cup shape 2V 4 dia 0 553 55 59 AII 6 cyl 3835121 A R 20 frt and rear in block 2 in 38 70 All 6 cyl 3835577A R 05 oil press pipe in block O D cup shape 55 60 All 8 cyl exc 322 3701638 6 05 oil press and tappet cup shape Vz O D 1 531 55 62 All 261 3759386 1 10 oil filter gallery hole plug V2 0 D x Va long 55 88 All 8 cyl exc 322 366 427 3738306A R 40 water jacket pipe 1 sq socket 56 59 All 322 1343096A R 20 head core support holes low pressure oil line rear head rear end cup shape 1 O D 56 59 All 322 1343489 1 18 camshaft bearing hole cup shape l u dia 0 553 56 59 AII 322 1343470 A R 20 high press oil gallery line low press oil line front low press oil line right rear rear locating hole cup shape 0 D 56 59 All 322 444782 2 10 oil line pipe 18 thd sq socket 8 971 1971 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31S T 0 033 0 034 0 8 REV 6 71