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As cheap as oil pumps and pickups are, for a performance build I would replace them. I have had great luck with the Melling 10554 (standard volume/high pressure). The Melling Select line of pumps have a more robust casting than stock AND the popular M155 line of pumps. I wouldn't build a 383 without one, hence there being one in mine. Many guys DO reuse stock pumps on performance builds without a problem, but this is just my personal preference. Gil Davis Racing Engines of West Chester PA also suggested replacing the OEM pump with a Melling Select.
If you want to reuse that OEM pump, I would at least have it blueprinted and reconditioned.
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