ONe side "open" w/ breater.
Other side hooked into a PCV valve installed in Manifold, or "T''d into brake booster vac line.
Point being in the end.....the only reason the air filter box is part of the PCV....is to filter air before going into the one side breater.....if you have a seperate filter on there, then the other vavle cover port get's hooked straight to the valve. No further need to tie it into the air box.
I just did some reading on PCV valves, but still have questions. This car does not need to pass emissions. There is no need for a PCV valve. So as far as crank case ventillation, should my dual breather caps work fine or should I pull crank case air through one or both carbs?