It would be great if Marcelo could type complete sentences . There was a point in time where I used to type like that and I cringe at the thought of anyone trying to or that had to read through that .
Anyway . I used to have a a9p and a Anderson PMS both with just a screw in filter on the valve cover and the pcv still in line . Then just dual open breathers no pcv , and then eventually 2 -10an lines to a moroso open catch can with a breather . The car never had an issue with it . I understand in theory whatcan happen but I have never had an issue .
Now I have the Holley hp of course on the same catch can setup and no issue .