67 twin turbo dart

Well so far so good, started the car up today, let it get to temp and no leaks so far. Do you all think that a breather tank size matters? Was thinking the small one I had on the car was just too small to vent all the gases out without pushing on the other port? Plus think there would be benefit to adding a 10an fitting to the fuel block off and running another line to help vent it all? Have seen some 4 port catch cans, but if off both valve covers isn't enough without going a vacuum pump, adding the third vent, thoughts?