WRe, thank you, I saw this (by the way: I started with B2B already...). My friend with original late US car (the same you were helping with the shot thrust bearing) checked these numbers and most of the parts are NLA.
He says it looks like once you open it, you may not be able to have it back together tight. We know from BBB that there are valves inside and we know how it works, we may try carb cleaner, maybe it is just gummed up with old gas.
The symptom is - oil dripping from not tight connection to engine. Then he started blowing through various hoses and where it should shut off pressure - pressure goes free.
There are vsalves perfroming similar functions from pre-computer activated purge era, I though maybe someone figured which one to use.
