So this 86 GLH I just bought is a factory non-ac car. It is the first non-a/c car I've had that had the little air vents in the center console instead of the little convenience light. What setting do I need to place the heater controls to get the air to come out of those? No matter what setting I select the air comes out of the floor and defrost vents...never out of any of the vents on the dash or the center console.