Brake Vacuum ...
 

... does anyone happen to know how many inches of vacuum is present at the brake booster in stock form ? I am guessing it is the same amount of vacuum present anywhere in the system, just wondering if it is less than 14 inches or greater than 14 inches of vacuum.

Think it would depend on throttle position, engine load, on the brakes, etc. The vacuum is never steady state in a engine. Every time you change throttle position, it changes too. At the vacuum booster. I image it's the same. Going from 30" to 0". That's why the reservoir. To help maintain vacuum.