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Anniversary 427 Big Block Engine

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Aluminum full roller-rocker arms with a 1.7:1 ratio are used in the new ZL1, and they ride on 7/16-inch studs.
Anniversary 427 Big-Block Engine - Big-Block Birthday

 Aluminum full roller-rocker arms with a 1.7:1 ratio are used in the new ZL1, and they ride on 7/16-inch studs.  View Related Article

 

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