I have an aftermarket Vortech breather on my 454mag Mpi.. I run a #6 hose from my valve cover right to the face of the breather so it does not go through the filter.. That seems like it would be allot of neg. preasure sucking from the crank case.
Will this be ok especialy at WOT.. Or am I asking for drawing up too much engine oil or mist and messing up sensors etc.

Its fine that way. Merc doesn't run them through the flame arrestor either.