Thanks everyone, for jumping in so quickly, sorry to not provide enough info...
I'm told the o-rings "through bolts" which I take to mean studs (but may be wrong) are shot, causing some leaks. I am also told that the head gaskets are leaking. The PO did a compression test, but so long ago that I doubt it is relevant any longer. Not sure about leakdown. There's about 150K on the odometer, which I believe at least going back to 1993 or so (I have service records from the PO).
I recently changed the crimped oil lines for new. The shop did an oil change, and after checking it myself after less than 500 miles, I didn't even see oil on the stick. After adding 3(!) quarts, the oil level is between the dots on the stick (and yes, allowing the engine and oil to heat to temperature).
I'm in the DC metro area, and I am more than willing to treat for beer for a compassionate diagnosis/ear!
Finally - here a pic! Thanks! Any further advice is well appreciated!
https://www.icloud.com/photostream/#A5JtdOXmJ0kdVS