Right - something has to drive it, it needs brackets and adjusters, plumbing to a masked source, and $$$. A JY smog pump is a help, but not big enough.
I like to design in as much "passive" stuff (no or few simple moving parts, tuning is done by size and path routing) for oil control and pressure management as I can.
A can for breather expansion can be improved a bit, but it's not easy.
1. the holes from the valve cover should be as big as possible to kill velocity.
2. crankcase pressure reaches the head through the pushrod drains, and they're not as big as I'd like (plus, the vapor carries the oil back up with it), which is why some plumb a big hose or pipe from the tappet cover or the side of the oil pan, or timing cover directly to an expansion tank.
3. if you have an electric fuel pump, the pump hole can be a pressure take-off.
4. if you still have oil spray at the last breather opening, make the pipe supplying it vertical, as tall and large ID as possible (before hood clearance).
