This post will get moved to Windsor Power by Kevin.
How much does the pressure drop when it gets warm? It it idles at 50-60 psi cold, then idles at 30-40 hot that is nothing to worry about. If you warm idle oil pressure is around 25 psi or lower on a brand new shortblock, you have problems. Too much bearing clearance.
You do have a mechanical gauge, and are not going off the factory dash unit right?
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