Clearance for RPM Air Gap...

That's good info. I'm no expert on engines. I'm learning as I go along. It would appear to me that the PCV is on the driver's side and plumbed to the vacuum port on the front bottom of the carb. It also seems as if the passenger side valve cover is a breather, but it is plumbed to the air filter base. So, I would think that's pulling vacuum too.

I'm going to take pictures of both of these tonight and will attach in here tonight or tomorrow.