1964-79 Oldsmobile V8,1977-80 Pontiac 403; Timing Cover; For 330,350,400,403,455 Olds Engines Reproduction front crankcase cover or timing cover for a variety of 1964-79 GM models equipped with Olds 307, 330, 350, 403, 400, 425, 455 V8 engines including the popular 1977-80 Firebird and Trans Am 403ci equipped models. This stock style replacement front timing cover plate replaces the original GM units which tend to rust out where the water pump bolts are. This part should be replaced whenever corrosion is present.