i've come across this once before, which leads me to think it's a fairly common fox body problem... i just can't, for the life of me, remember how to do it. there's a vacuum issue in which the a/c only blows out of the defrost vents. can someone snap a picture of the vacuum lines and point out what exactly i need to do to fix this? or, hell, just a picture of the correct vacuum lines to be looking at would help... i'm sure i could spot a problem if i knew where to look.

thanks in advance.