I have found a lot of threads that have ALMOST answered my question. I have a 327 with the original oil separator canister removed which I have replaced with a PCV valve plumbed to the back of the intake. I have an intake without the original oil filler neck (I don't want to install an oil filler neck) My valve covers don't have breathers nor do I want to drill holes in them (original corvette ones) I am happy to add oil via removing a valve cover (super simple in my situation) My question is: I'm assuming I need an "air in" somewhere? If so, is there something simple I can install into the intake manifold to get around this? The intake isn't installed yet so I can modify what I need. Many thanks.