There’s an old test for spotting a genuinely serious engine: does it clear one horsepower for every cubic inch? This 1967 Corvette’s 427 doesn’t just pass that test, the 435-horse version blows past it entirely, and Chevrolet’s official numbers were famously conservative to begin with. Between the three street 427s and the race-only L88 lurking behind them, this generation of Corvette hid some of the most underrated horsepower figures of the entire muscle car era.
