Crankcase breather question

Unless you have a radical street engine,IMO, the first one you stick on there will be fine. You set your transfer slot exposure and it will all come out in the wash.
I ran the very same pcv on three different cams at three slightly different Scrs.
for over 15 years. IMO, this is a non issue.
The cams were:
292/292/108 Mopar, in at plus 8 to minus 4, vacuum as low as 8/9
270/276/110 Hughes, in at plus 4, vacuum about 13/12/11 depending on the idle speed, which I adjusted with base timing. This was my favorite
276/286/110 Hughes, in at plus 4 to straight up, vacuum around 11/12.
Scrs were;
readjusted to maintain about 180Psi cranking cylinder pressure.
As to the PCV just cut one open and you'll see right away how it works.
EDIT;
I've been using the same PCV, as I said. I have not experimented with others. Therefore I claim ignorance as to how other PCVs might affect the operation of your engine, especially a lower compression engine. What I'm trying to say is that nm9 has experience in this area, and has posted several times about it. And I just want to be transparent , that all my work has been on the same high compression engine, with the same PCV; so I just mighta got lucky. If your combo does not require any idle-air bypass;Your results may vary.