Am replacement PRV so don't know if this 100% applies... I've got one big takeoff from the passenger side intake rail (3/8"). Is the only line running to front of car, so I assume is driving brake booster and panel vents. Don't forget to check all other nipples (I had two capped off on UNDERSIDE of upper air assembly, now plugged), the cold start tube, the U pipes, and indeed the manifold itself. I often use spray carb cleaner to check -- engine will rev up if it hits a leak. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, doctordhd@xxxx wrote: > Can someone tell me where on the engine is the vaccuum hose to the brake > booster? I think I might have a vaccuum leak and want to pinch it off at the > engine to check. Thanks again. > > Dave > 6530 > > > [Non-text portions of this message have been removed]