You can go another route. You can purchase aftermarket open element air cleaners with hose nipples on the underside similar to the OEM setup in Al's drawing. The one that was on my car happen to have the provisions for 2 of them. This turned out to be perfect when my new 455 had such crankcase pressure that it was forcing oil past my rear main seal (the BOP Viton one-piece) before the rings seated.
So my setup was the valley pan PCV connected to the largest carb nipple and then aftermarket filtered breathers on both the driver's and passenger's valve covers with hoses running to the underside of the air cleaner. It worked well. I did have to buy several types of breathers from Summit to find ones with the largest hose connections.
In your case you could vent one side to the air cleaner and perhaps have just a breather on the other to provide the inflow.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
