Thanks for the input guys
I'm kinda thinking like FATHERFORD
A vaccuum in the system would be nice. However, I agree with chimazo that a vac. is not necessary and that it was just added for emissions purposes.
My main concern is just getting as much pressure out of the crankcase as possible. I want to be sure that I don't have to worry about the blowby not having anywhere to go.
So here's what I'm thinking for an "over-kill" system that will evacuate all pressure in the crankcase.
I'll use the same setup as DamnYankee, with the exception of the breather. I will run a hose to the airbox from the catchcan to create a vac. in the can to help evacuate all pressure.
I don't think DY's setup is flawed, I just want the extra vac. there for piece of mind.
For backup I'll add a traditional breather to the top of each valve cover - something small but adequate.