heater vacuum routing

[94LT1]

Does anyone have a diagram of the vacuum line
routing from the manifold through the controls
and on to the vent doors for the 94 roadmaster?

I have been chaseing an engine stumble problem
for 10 years, and today I noticed that when I
pressed the vent button on the hvac controls it
started to stumble.

Thanks, Dave B

[94LT1]

Please disregard this post the hvac controls
had nothing to do with the stumble and it appears
the controls are electrical.

Thanks Dave B