of the Sprint version of the Firebird. Canadian-market Pontiac automobiles were equipped with the Chevrolet OHV six. 250 The OHC was enlarged to for 1968 to 1969. The base engine produced while the Sprint versions were rated up to with automatic transmissions. The versions with a manual transmission received a hotter camshaft that boosted ratings to . See also Pontiac Trophy 4 engine Pontiac straight-8 engine Pontiac V8 engine List of GM engines References External links Pontiac Overhead Cam SIX Forum Straight-six engines Straight-6