the crankcase pressure you refer to is equal no matter where you stick your fittings
The engine is merely an odd complex shaped container. Try to picture your engine as a simple container.
If you have pressure in your crankcase your engine is either fooked or your breather is crap and cannot flow sufficient gases.
your crankcase pressure should be no more than 1 atmosphere or to the layman 0
ideally some negative pressure is preferable which is what a new standard cosworth had with it's breather design on engine decel