I am happy I was searching on this subject. I've had a standard PCV for essentially, a 302 or 5.0L motor, however, I have a 347. After my last 450 mile trip this past weekend, there was a lot of
oil buildup around the PCV area. It got me thinking about what this valve really does and from the answers in this old thread, I have a good idea and with the M/E Wagner article of how a conventional PCV and their PCV are designed, I'm sold on it and just put an order in.
I may even provide a small catch can but may look into the inexpensive Ebay stuff; Summit/Moroso stuff is WAY too expensive for just an aluminum canister!