I have a 1984 f-150 with a 302 and a motorcraft 2 barrel carb. The previous owner hacked up the emissions system and I am trying to put it back together. There are two lines I cant seem to identify. There is a hole on the underside of the choke. It draws a heavy vacuum and it is currently open. Does anyone know where it is supposed to connect to? Also, there are two small metal lines. One was for my EGR and I reconnected it. The other starts as a rubber hose on the back of the carb then transitions into a small metal hose. Any idea where that goes? I am hoping that wherever that hose goes it the source of my slight exhaust leak. Thanks!

 

Might be that line under the choke is supposed to be part of the choke.
the Holly I have works like that. could the other one be power brakes or PVC?

 

Pics would help. The threaded port on the bottom of the choke should have a metal line going thru the exhaust manifold to open air.