Custom builders looking to add performance and styling punch to their Big Block Chevy engine can turn to Holley for the Hilborn EFI-R Individual Runner Manifolds kit. "Based on the original Hilborn ...
There were many variations on the 427 big-block theme, with the designation of the engine’s RPO option codes making up the lexicon. Two versions of the 427 debuted in the Corvette line up for 1966.
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