1978 vacuum selector switch

[pwunderlich]

Hey guys...my a/c selector is shot and I am having a heck of a time finding a replacement.  It sits on top of the a/c control box and has a bunch of vacuum lines going to it.  I figure its shot b/c when you turn on the a/c the air blows out of all the vents at once no matter where you put the switch.  Even the specialty shops can't help me and i literally live down the road from outback. 
Thanks guys
Pat

[VileZambonie]

What is outback? Are you just assuming it's shot or have you tested it? You are referring to the switch in the dash?

[zieg85]

Make sure you have vacuum going to it.  There should be a black vacuum container about the size of a small grapefruit mounted on the firewall.  Engine vacuum goes into it and then a small line goes through the firewall to operate the vent/selectors of the HVAC system.

[pwunderlich]

What is outback? Are you just assuming it's shot or have you tested it? You are referring to the switch in the dash?

this place http://www.outbacktruckparts.com/  I get alot of stuff from here.

Im gonna try Zieg85's idea.  I was assuming its shot b/c it didnt look too good, but I'll give it a try.
but in case it is bad...anyone know where to find one?  I know some other people that do need the same part also
thanks guys

[VileZambonie]

Yea you should start testing it before you start throwing parts at it. Make sure like Zeig said - #1 you have vacuum to the reservoir and #2 that the vacuum hoses are both connected.