any 6 pak gurus out there?

When you open the throttle the vacuum drops if it goes below 4.5" the power valve opens, you really wont know unless you run it down the road with a gauge on it. If the PCV valves does not work right, spring broke, wedged open, stuck, they will leak to much vacuum. Just some ez things to check. It has 8" vacuum at idle?
Where are you checking this at?