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Bored&Stroked · 10-04-2023, 01:14 PM

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What oil pump do you have? If you're running the 49-53 pump (which has its own pressure relief system), then run the longer spring.

10-04-2023, 01:14 PM	#26
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,910	Re: Rebuilding my Flathead random questions Sponsored Links (Register now to hide all advertisements) What oil pump do you have? If you're running the 49-53 pump (which has its own pressure relief system), then run the longer spring.