I don’t believe a dual plane manifold which a stock Ford manifold is would know the difference as air from the carb air horn and the PVC valve would mix. Since the vacuum for the distributor and the power assist brakes are dead headed also they may not care either.
However I have never seen a modern carb PCV valve and hose piggybacked on the same port of the carb with anything else and most are on the front. Most power brakes are on the back. I’ve never had good luck using intake vacuum on a distributor. Every engine I’ve had runs and idles better on venturi vacuum. Your experiences may differ.
I would like to add I believe modern carb and aftermarket have a hose fitting for the PVC system that is on the front 2 barrels of 4 barrel carbs where they spend 99% running paired to both sides of a dual plane intake. It is my thought the blow-by vapors are shared by all cylinders equally by mixing with the vaporized gasoline immediately thru openings in the base for it. It may have not been that way in the past with the exception of a 2 barrel which had its fitting on the rear with its PCV valve mounted on the carb base and not a rocker cover.
Today’s tuned port style has the PCV valve in the rocker cover and a hose right behind the throttle body which allows oil coating of the intake over time. “Catch Cans” can help in letting less oil vapor into the intakes and Ford Performance has engineered them for the 5.0 Coyote.
I do not know of mounted on a Ford Y-Block engine but I have sure thought about it.