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Zl1 Aluminum Big Block

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Here's a 1969 427 ZL1. The valvetrain featured 1.70 rockers and specific inner and outer valvesprings for the ZL1.
ZL1 Aluminum Big-Block - The Block That Rocked

 Here's a 1969 427 ZL1. The valvetrain featured 1.70 rockers and specific inner and outer valvesprings for the ZL1.  View Related Article

 

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