but one thing is the air doesnt seem to be going anywhere else. i took part of the dash apart, sw the vent open for the front, i ever stuck my hand in there, not much air.i saw the condensor in there, or a small rad element, not sure what it was. but i did see the vacuum lines you are talking about, not alot of vacuum, when i unplugged some.
one thing i forgot to mention, then buttons on the dash for the blower are bypassed, there is a separate switch for it, with 2 speeds, but it does work good.