Yep, you can add a cheap catch can between the breather and the PCV. I have one, it's sitting in the Weber box in my car. Fits nicely (given I've twin HS2's). Does a great job of keeping mayo out of the engine.
I have the Mini Mania fuel pump breather. The path for gas flow is out, back 180º, then 90º to get out of the breather and into the barb/hose. Now that I have a tacho, I seem to rev the car harder. Meaning, beyond 4k. And yes, if I go over 4,500, it does pump oil into the breather hose, then into the catch can. But I don't get oil into the PCV, or the inlet manifold. I've pushed some stainless steel wool down the breather hose as a droplet breaker, it's made
some impact, but I still get some oil in the catch can. That said, the oil's not making it into the engine, so it's not the worst possible situation. And it's easy to keep it below 4,500rpm (especially with a 3.1 diff!).
