[Kenth]

Not being able to share a vacuum connection for the PCV and brake booster must be one of the longer myths.
Think for a moment about where the vacuum comes from.
Exactly, from a source under the carburetor's throttle blades, so there is no difference between the vacuum for both functions, the vacuum is taken from the same place.
Then there are those who are afraid that vapors from the PCV would find their way into the brake booster if you connect the hoses to the same port.
This is a waste of thought, it doesn't matter if the vacuum for the brake booster is taken from a T-fitting on the PCV hose or a separate connection under the throttle blades, the vapors are there too before they go to the cylinders for combustion.
And then, not least, the engineers have already solved the problem of vapors finding their way into the brake booster by having the brake booster use a check valve.
So it's mostly for practical reasons that the PCV and brake booster have their own ports in the design, some engines actually uses a shared port from factory for this.

HTH