This is what Gdads factory recommendation would look like, they did the engineering for us so why reinvent the wheel
The oil filler neck with outlet is available, ordered an early corvette v8 filler neck and cap, or make one out of the stock draft tube
https://www.stovebolt.com/ubbthread...0s-engine-with-non-pcv-valve-covers.htmlIs a previous discussion in this with more info and pics