low oil pressure

from the little I know about this engine and seeing the picture of how pretty painted it is...In my day, we would call these things "Krylon Motors" which is an old motor reslapped together with gaskets changed 'or not' freeze plugs changed 'maybe' new timing chain 'sometimes' ..but either way, it was never new or rebuilt ....was just an original 40+ year old engine from a van stuck into an a body..

I am not saying I know that's what the OP has, merely suggesting the possibility.
I myself wouldn't wanna set myself up for a tow bill by assuming the motor is fine as.
I'd change the pump, pull a cap bearing while I'm there..