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Small Bore Pontiac Engine Build Oil Drain

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The two central oil drain back holes in the lifter valley are also enlarged. All rough edges around the lifter bosses are ground smooth and fully de-burred.
Small-Bore Pontiac Engine Build - Revenge Of The 350

 The two central oil drain back holes in the lifter valley are also enlarged. All rough edges around the lifter bosses are ground smooth and fully de-burred.  View Related Article

 

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