O.K. Brian start over, plug the breather and re run your vacume test,still zero? then somewhere ya gonna be plugged up on the vacume side, & yes it should stall if ya pull the hose off the pcv " makes her go super lean " O.K. what about the pcv baffle in the valve cover, maybe pcv is bottoming out & shuttin it off???? or if custom valve covers sometimes ya gotta punch a knock hole open & install a baffle kit ???? but in any case the vacume is open all the way to the pcv valve,what about just simply a bad pcv happens all the time, or too soft vacume hose thats sucking shut (or kinked) Or wrong pcv valve for the application??? what evers goin on it's gotta be from the pcv valve to the inside of the valve cover.... Hey, my best pcv system test is simply a piece a celephane over the breather hole,with the engine at idle that cellephane should hold to the breather tube and then suck in slightly as the vacume builds, If it'll pass that test then your good ta go........