Lycoming Parts Catalog O-320, IO-320, & LIO-320 Series Aircraft Engines. PC-103, dated April 1970. Technical Publication Supplement SSP-488 in front of manual. Contains 10 sections: Crankcase - Crankshaft and Camshaft, Accessory Housing and Drives, Cylinder - Piston and Valve Train, Ignition System, Electrical System, Fuel Induction System, Cooling Baffles - Exhaust - Oil Gage and Propeller Governor, Service Replacement Set Section, Vendor Accessories, and Numerical Index. Manual is an original.