[Pete]

A neat but complicated engineering project.
On a wet sump engine, I have done the crankcase breathing much simpler with all stock parts since the mid 50's.
On an 8ba block I use an early (pre 49) manifold and just cut 1/2 inch off the top of the fill tube. I leave a 1/4 inch wide tab the height of the manifold deck to keep the tube from coming out. I use an original early oil fill/breather stand with mesh filled cap.
Just like factory. No smoke or oil puking up to 7K rpm.