1 1 ENGINE INSTALLATION INSTRIICTIONS 1 1 PART NO 3941194 CONT 1 GENERAL INFORMATIOIN 1 3 Full flow oil filter which can be purchased new or transferred from replaced engine must be used when installing this engine 4 This engine assembly has an intake manifold with a plugged 3 8 tapped hole on a runner as a source for vacuum take off 5 On models equipped with nylon spark tube it may be necessary to cut sufficient length from the distributor end and insert a 2 piece of 3 16 copper tubing as a connector then complete the con 1 nection with required length of hose cut from 3830665 1 6 When installing this engine on certain models the transfer of oil pan and oil pipe and screw assembly 1 may be necessary On models with air equipment the oil pan inlet manifold and RH exhaust mani fold may require transfer from replaced engine Also the water pump water outlet and thermostat bypass housing may require transfer on models with thermostat bypass system 1 7 Models with optional equipment require transfer or replacement of engine parts special to such options 1 8 On 1955 56 models grind a flat on the starting motor flange at upper mounting bolt hole for clearance 1 with cylinder and case also use through bolt for attachment 1 1 9 If any part number listed above is not shown in the current master parts catalog check history sec tion of the catalog for replacing part number A 10 For double duty models purchase new or transfer the following a 1 3742205 Exhaust Pipe 1957 Models b 1 3728748 RH Exhaust Manifold 1956 Models c 1 3817806 RH Exhaust Manifold 1957 Models d 1 3731702 ecial Stud Inlet Mfld 2nd Stud 1956 57 e 1 3836646 Special Bolt Water Pump Attach Upper LH f 1 3735310 Generator Bracket Supt Gen Mtg 1956 57 Models Transfer from replaced engine 1 1 1 197O CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATlON P A 31 73