You didn't mention what you are using for an oil pressure gauge. Since yoiu seem to be concerned, the best way to verify the concern is with a known, accurate, mechanical oil pressure gauge. Install one for diagnostic peace of mind. Then report back. If your relying on a factory gauge, they can read all over the map, both low and high, with the same gauge. As far as oil pumps go, Pontiac did make a very small oil pump in the early days, a 5/8" inlet tube and 40 PSI max pressure. But nobody uses them and I have no idea if they are even out there. Probably 90-95% of the Pontiacs running have a Melling M54DS or F54DS pump. Both have the same flow output, a 3/4" inlet tube, with a limit of 60 or 80 PSI. I doubt you have any issues but a test would probably make you feel better.
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