ENGINE INSTALLATION INSTRUCTIONS PART N0 3930950 Cont GENERAL INFORMATION Cont 5 This cylinder block assembly has a composite cylinder and case with two 2 machined oil level gauge r bosses A special pin Part No 3848405 is included with this assembly for the purpose of plugging the oil level gauge tube hole not applicable to the installation G When using on models equipped with Powerglide transmission it is necessary to remove the clutch pilot bushing from the crankshaft 7 This engine is equipped with an aluminum camshaft gear An undesirable noise level may develop when using the aluminum camshaft gear on passenger models It is therefore recommended that the aluminum gear be removed and replaced with the gear from the replaced engine if in usable condition or purchase new bakelite gear 8 When transferring front end covers and oil pan assemblies on 1967 and prior models the use of oil pan gasket unit 3930962 is required Also the four front attaching bolts can be discarded as they are not required with the use of the oil pan front seal contained in the gasket unit j I97O CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORAT ON P A 3OA 64