Advice wanted

I just installed new Mopar Performance Valve covers black wrinkle on my mild built 318. I would like a PVC Valve on one side and a breather cap on the other side. Don't really want to do the punch out thing on the valve covers. So can I just remvoe the fill caps and replace with rubber gourmant for PVC and twist in breather or rubber gourmant for push in breather. Also I'm trying to find the wrinkle black breather cap with no luck so far Summit does not have them so where can I get it. Also I want to put the matching wrinkle black air cleaner on the engine. I have a Edelbrock 600cfm non-EGR for engine will the air cleaner fit on carb with no modifications. All info will be greatly appreciated.