An mfi setup has a pipe that runs to the metering unit to suck the excess away instead of breathing to atmosphere via a breather.

Efi setup noramaly breaths to amosphere via a small filter or you can plumb it into a vacum with a little one way valve like the one on your brake servo pipe so you dont push boost through the engine.

So yes you can put a t piece and 2 hoses to one outlet and then a breather into atmosmphere. you will get small ammount of brething in the engine bay with small smell of oil in the car this way.