I'd be inclined to deal with the blow by before trying to crutch ring seal with a PCV system. That's not what they are for.

That said, I'd seal the engine and run your PCV system closed and run pan evacs with it. You can get a negative pan pressure doing it that way.

Not as much as with a vacuum pump but more than what you have now.

Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston