this thread contains a couple of pictures of my vaccuum lines on my engine (in the hunt for trying to work out why it didn't cold start idle which ended up being the complete lack of an idle control valve)
if you look at the second to last picture it shows the bottom of the fuel pressure regulator, there is indeed a vaccuum line as people100 stated, that goes into the manifold via a 'T' piece that also breaks off to the vaccuum advance/retard on the distributor (although i have been led to believe this may not be the correct dizzy internals so ignore that bit).
the main thing is the line goes from the regulator to the manifold though (follow the yellow lines)