the only vacuum lines on that engine should be 1 for the advance circuit on
the distributor, 1 for the power brake booster, and 1 for the auto trans
modulator valve, if you have an auto trans.
> I'm in the process of troubleshooting some vacuum line issues on my
> 1977 Ford F250 400ci. Does anyone have information on locating a
> Vacuum Routing Diagram for this Make, Model, and Engine type? Any
> information would be greatly appreciated.
>
> John