I am doing a lot of work under my dash and one of the vacuum lines became disconnected, one end goes into the controls but I am not sure where the other end goes, anyone have a schematic they can share showing the connectivity?

thanks!

Maybe this will help:
http://thefirstgensite.com/library/partscounter/illustrated/heatair/air1.html

Ronnie- that is one excellent doc, better than the supplemental manuals I have in a lot of respects.

My control assembly was epoxied at one point as well as where the vacuum hose connects to the vacuum activated compressor switch ( I just finished cleaning them both of old glue and am planning on re-epoxying with JB weld unless I find a replacement )item 37 in the key. That was the connection I couldn't find because when they glued it together way back when they left it hanging... This diagram plus my supplemental firebird manuals take most of the mystery out of the equation.

thanks!