I use 2 breathers Adam. After a trip down the quarter I have to wipe a little oil from around the breathers. No amount that I was ever concerned about it.
My old 360, though not as nasty as your current engine also used 2 breathers. I also did a quick cheack once a week on all things with a rag to wipe up a almost nil amount.
I think the use of e-vac tubes w/mufflers are not the greatest idea. I could be wrong. But my thought is the vapors of oil cpllect in the muffler. I know they'll coat the pipe, but the muffler seems like a worse place. Possible collection as deep as it could be kind of thing.
The e-vac tubes also work on a vaccum idea of the exhaust rushing past the point of the pipe into the header/collector to draw out the oil vapors. This is an area of more the merry I think. A muffler could slow this up.
