Having gone peripheral port i have obviously lost the stock lower inlet manifold on my '88 EGI. Thus i have lost all my vaccum points that come off it.

Anyway the "power brake unit" as mazda call it or brake servo as most call it has a huge vaccum that feeds off the LIM. My question is can i just bloke it off?

 

Yes, but expect an increase in leg pressure to brake the car. You might need to reposition the pivot point on the pedal to make it easier to push.

-Trent

 

as long as you dont mind non power assisted brakes you could just remove the entire booster and remount the brake cylinder.