Ron, check the thread linked below, about half way down is posted a pic of the right side of my carb. It shows a vacuum line running over the choke to the right rear carb mounting stud. In the front, the hose runs to the diverter valve. I think that's what your talking about. I don't know of anyone repro'ing that metal line, but it would be real easy to make by hand. The vacuum line has a small metal strap/bracket which mounts it to the right front carb bolt.
http://forums.maxperformanceinc.com/...ghlight=vacuum