Thank you Albertas for the technical explanations, very instructive. I was not sure what a PCV valve was in English, but again, Wikipedia was here
Here is a picture of the small breather filter i installed. It is attached to a piece of Gates oil hose. Hope this will be OK. If it is vibrating too much when the engine is running, I can put a longer piece of hose and attach it to the block with a P-clip. We'll see when I start the engine (hopefully this month)
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Thanks again.