We glued the filler cap into the valve cover and added 2 extra quarts. Oil pressure is now stable and no leaks upstairs, but the extra oil is pushing out the front seal at speed. Not enough to quit running, but enough to make a mess.
I don't think the rings have given it up yet, as there's nothing in the vented oil puke tank which is connected to each valve cover with a 3/4" hose. When the rings went last time there was a lot of oil/vapor in the puke tank. For a while I was draining it back into the engine from the bottom of the puke tank into the PVC hole in the valley pan. After a rebuild, the puke tank was never wet.
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