Chevrolet's Mark II 427 'Mystery Motor' Was A NASCAR Engine ... but the combustion chamber in the cylinder head was a big change that would not only improve performance but also preview the ...

Also in 1969, Chevrolet built two "ZL1" 427 Corvette coupes. The ZL1 engine was essentially an all-aluminum version of the L88, with the aluminum cylinder block and heads offering a tremendous ...

Winning production car races was easy, and Chevy unveiled a real ... "porcupine" head engine appeared in 1965, followed by the 427 cu. in. V-8 in 1966. A year ago, it looked as if the Mako ...

Last year's 396 "porcupine head" Corvette was ... and with 427 cu. in., the gap between advertised and actual becomes even broader. However, Chevrolet insists that there are only 425 horses ...