I’d ditch the breather in the front and plug it, or run two hoses (front and back of the valve cover) to your catch can. And you’ll have to plug the ports in the manifold youre currently using for pcv.
99% understood. To confirm, that means that air could go either way through the filter/catch can into or out of the crankcase in order to normalize crankcase pressure to whatever is needed as there would be no check valves or PCV valves anywhere in the system.