Slant 6 oil pressure woes…

junkyardhero said
have you verified that the wiring to the pressure sensor or the connection there isn't hanging on by a thread.

i'd be inspecting that before replacing oil pumps.

but before ANY of that i'd put a mechanical gauge on it to confirm pressures: cold, hot, idle, 2K and on a road test-- have a co-pilot watch the gauge while stopping/accel, etc.
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Funny story… it turns out that I don’t have an oil pressure sending unit. At all. The wire that goes to it is cut and was dangling down against the greasy block. There’s a plug in the pump where the sending unit goes, and my ‘77 block doesn’t have a hole for the one that goes in the galley behind the pump like my old motor had.