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Small Bore Pontiac Engine Build Lifter Valley Drain

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The lifter valley oil drain hole is enlarged, and its bottom is ground down to the same level as the valley floor. This eliminates the factory lip and speeds oil return to the pan.
Small-Bore Pontiac Engine Build - Revenge Of The 350

 The lifter valley oil drain hole is enlarged, and its bottom is ground down to the same level as the valley floor. This eliminates the factory lip and speeds oil return to the pan.  View Related Article

 

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