Bill Hanlon's WWII setup is exactly what I discussed doing if I were so inclined to bother with adding a PVC system (which I am not) the last time this topic was brought up.
That is, using a down draft tube from an earlier engine which had the oil fill cap on the top of the draft tube and use a later model filtered cap.
You just need to plug the bottom end of the draft tube.
I also suggested having the PCV valve in or near the valve cover, and the source of vacuum at the wiper vacuum port on the manifold.
