84" Biarritz power brake booster question

I have noticed since the end of last year that if I step on my brakes once the brakes seem fine, but if I step / pump the pedal I have no power brakes at all. I would think and was told that this is a power brake booster problem. This makes sense as I originally was troubleshooting a vacuum leak which was not allowing the air flow to the defroster and A/C. when the vent buttons were pressed on the module. I checked the module and all in cabin vacuum lines and they all work fine. I removed the parking brake release diaphram at the end of the summer last year and will put it back when I get
the booster replaced. I'm hoping the PB booster problem solves my vacuum leak as well.

Possible?

RD