Ok I have the heat going in my 76 280z and there is hot air coming out of the defrost for the winshield but only there. the air coming out of the center of the dash is cold. i have also noticed that when I punch the gas up to about 6 grand the windows fog up and I can smell antifreeze like really really bad! I have had the car for a week and im just know starting to fix the little problems and this is one that NEEDS to be fixed so I can drive it. Sooo what do i need to do???