69 L72 CAM

[LS6 RAT]

396/425blr,

This may well be one reason for the difference in ratings initially between the Corvette and Camaro, since the more streamline freer flowing manifolds would not clear the engine bays of the Camaro, Chevelle, Nova models without slight modification.
However these larger manifolds were also used on the full size models, such as Caprice, Biscayne, Impala and their ratings were still 425hp. My opinion is that the Corvette was considered the flagship of the Chevrolet division, and as such would certainly merit the title of highest hp rating.