I’m not quite sure I follow you. As I understand there is an air breather on one valve cover and then on the other valve cover there is a fitting that connects to the air cleaner. Do you by chance have a picture of what you have done.
Mine would be different because it is a slant six. Here is a diagram of how a properly set up PCV system should be. PVC valve on one side and crankcase vent on the other.