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Anniversary 427 Big Block Engine

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Yes, it's a brand-new all-aluminum 427 block from GM. While the ZL1 block has been available from GM Performance Parts for the last few years, in '08 you'll be able to buy a crate engine built from it.
Anniversary 427 Big-Block Engine - Big-Block Birthday

 Yes, it's a brand-new all-aluminum 427 block from GM. While the ZL1 block has been available from GM Performance Parts for the last few years, in '08 you'll be able to buy a crate engine built from it.  View Related Article

 

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