I have a 87 cutlass that doesnt blow air out of the front vents to you know why?

In this model it is controld by vacume ,check the vacume lines under dash.

Ok will do. I do know there is on door. and that is the bend door. bottom works and defrost just not fronts. A few vacuum lines under the hood are disconnected but I don't see anything to plug them up to. I just purchased the car the motor looks as though a lot was changed out.

Thanks