Yes- - - -with the proper PCV valve there should still be plenty of vacuum to support the brakes. You might want to consider installing a vacuum reservoir made from a paintball gun CO2 tank or something similar. I've even used a piece of PCV drain pipe with a couple of caps glued onto it, hidden inside a frame rail as a vacuum reserve. One a couple of feet long fits nicely under the cab. Paint it black and it virtually disappears.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!