Since there's been so many topics of A/C systems, maybe someone can help answer a concern of mine. My friend has an '83 Olds delta 88, and on that car there are manual controls for the A/C with MAX, NORM, BI-LEVEL, and VENT. Well, when you turn that A/C on, all the options blow through the floor vents, except NORM which blows out the dash. Is that a vaccuum line issue? I know this isn't a Cadillac where max and norm arn't an issue but it is a fellow GM cousin; can anyone help? Also it's a ban-new r134a sytem, everything under the hood works fine. Thoughts?