Can anyone give me a pointer where the open black nozzle on this brake booster is supposed to go. Is it meant to be plugged or have a hose (which goes to where?). can't see a nozzle the same online, most only have the intake manifold hose and a capped. Many thanks

 

Put a cap on it... If you come across a single port booster check-valve, I would swap it over to that.

 

Will do, thanks Cowboy

 

Something like this....

https://www.napaonline.com/en/p/UBP8...oC_ncQAvD_BwE&