1967 and early 1968 A-body 383 4-Barrel. Note, this air cleaner looks similar to 1964-65 426 Wedge 4-Barrel unit but is black wrinkle instead of chrome and has a larger area around wing nut. Also used on early 1968 B-bodies. Note that 1967 cars would be equipped with an AFB carburetor and would use a different base plate with a smaller diameter hole for the carb than 1968 models. 1967 cars without cleaner air package (CAP) did not have nipple to connect to breather cap.