I used the threaded port just behind the carburetor for my PCV connection.
In my case I am using a Holley carburetor so I do not have all of the ports offered on the Edelbrock but I do have a manifold vacuum port at the rear of the carburetor that I am using for my brake booster.
Looking at the valve covers pictures you provided you are going to need to add a hole with a hose plumbed to your air cleaner to provide air into the crankcase unless you engine has a different air inlet. The one existing hole appears to be sized for a PCV valve, or could have a grommet installed that would work with a PCV valve. That opening is not the greatest for oil fill given its small size but it would work.
