I've added oil through the hole where the PCV valve is. I like the idea of the breather tube in front of the motor. I had an old 327 that had that. This 350 manifold isn't set up for it though.
So my current plan is to add this breather to the other valve cover. Seems like the easiest. Not sure why I didn't realize I'd need some fresh air inlet to balance things out. Thanks for the input fellas. I appreciate the advice.