Vacuum Line - PLEASE HELP

[DonC]

There is a vacuum line that taps into the vent hose on the valve cover on a big six engine. What does the other end of this vacuum hose plug into?
PLEASE HELP!
Thanks!

[winfred]

bottom of the intake on the left side of the car by the support bracket that ataches to the block, the vacuum line to the fp reg plugs in there too