1956 MODELS Cont ITEM QUANTITY PART N0 DESCRIPTION REMARKS R 2 3138803 Reducing Bushing i i S New part required Heater Hose Fitting Adapter S 2 3744411 Spark Plug Shield s i Right Front and Left Rear New part required T 2 3744412 Spark Plug Shield Left Front and Right Rear New part required U 2 3744408 Ignition Wire Support New parts required Used attwofrontspark plugwires both sides V 2 3744409 Ignition Wire Clip W 1 3725273 Generator Bracket Can be transferred from replaced engine 1955 IVIODELS Require items A D thru F and H thru W plus the following X 1 1513130 Temperature Gauge New part required Engine Sending Unit connect to Dash Unit using 5298971 Bulk Wire as jumper Y 1 1513378 Temperature Gauge New part required Dash Unit connect to ignition switch or switch controlled terminal on junction block same as above Z 1 3722959 Oil Level Gauge New part required AA 1 3749684 Crankcase Ventilator Tube New part required AB 1 3726643 Ventilator Tube Bracket New part required AC 1 5574538 Oil Filter Unit A New part required If a new Clutch Housing is used enlarge rear mounting holes to 7 16 diameter and use M6 14 Bolts GENERAL INFORMATION 1 On Models equipped with Powerglide it will be necessary to remove the Clutch Pilot Bearing from the Crankshaft It will also be necessary to transfer the Flywheel Assy Flywheel Housing and Components from the Engine being replaced Z On 1955 56 models grind a flat on starter motor fllange at upper bolt hole for clearance with cylinder and cease Also use a thru bolt and nut to attach starter at this location 3 When installing Clutch Housings transmission pi lot bore alignment and face runout should be checked as specified in Shop Manual 4 Models with optional equipment require transfer or replacement of engine parts special to such options i e special generator would require mounting bracket and brace to match generator 5 On Models with vacuum Windshield Wiper use Carburetor attaching hollow Stud 3749170 lfor vacuum take off 6 It may be necessary to transfer Inlet Manifold from replaced engine or to drill and tap holes in Inlet Manifold for vacuum takeoff 7 If number shown is not cataloged check History Section for replacing part number l wi3c iat Motor Division General Motors Corporation