Hey everyone,
Thanks for all of the thoughts.
Quick update. Looking at receipts from the previous owner, the car had an oil change 1000 miles ago, using "high mileage" oil which I have read I'd a no no for the white blocks.
I changed that out yesterday to full synthetic 5-40.
When I started it up this morning I could still here the knock but it was way quieter than before. Maybe a coincidence but I'm guessing the oil had something to do with it.
I have it going to a shop next week to look at vibration problem I'm having. Per one of your suggestions, I'll have em check the oil pressure while it's there.
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