Gen I Small Block Chevrolet V8 Engines 1955 – 1957 265 cubic inch 4.3L 3.750″ bore x 3.00″ stroke 265 specs 1957 – 1967 283 cubic inch 4.6L 3.875″ bore x 3.00″ stroke 283 specs 1962 – 1969 327 cubic inch 5.4L 4.000″ bore x 3.25″ stroke 327 specs 1967 – 1969 302 cubic inch 4.9L 4.000″ bore x 3.00″ stroke 302 specs 1967 – 2003 350 cubic inch 5.7L 4.000″ bore x 3.48″ stroke 350 specs 1968 – 1973 307 cubic inch 5.0L 3.875″ bore x 3.25″ stroke 307 specs 1970 – 1980 400 cubic inch 6.6L 4.125″ bore x 3.75″ stroke 400 specs 1975-1976 262 cubic inch 4.3L 3.671″ bore x 3.10″ stroke 262 specs 1976 – 2002 305 cubic inch 5.0L 3.736″ bore x 3.48″ stroke 305 specs 1979 – 1982 267 cubic inch 4.4L 3.500″ bore x 3.48″ stroke 267 specs