Does anyone know how to adjust the fresh air vent flaps on an '81 so that
freezing cold air doesn't continually come in?  I move the sliders over to
the right and the flow of air decreases, but still comes through!  I removed
the whole dash board, what Bentley calls the fascia, and all I could see was
the cables went down in front (front as front) of the glovebox area.  I have
an aftermarket AC taking up space up there and supposed the next step would
be to remove it to see where those fresh air vent cables went..  ugh.  Is
there any other way besides duct tape on the vents to fix this?

Thanks!
Christopher Darilek
77 & 81 Westfalia