I went to autozone a few hours ago to get a serpentine drive belt for my 93 GT as mine is pretty much worn. The gentleman at autozone needed to know whether my A/C was factory or dealer installed. He said it makes a difference as his computers report two sized belts, and the correct size depends on the A/C install. This is news to me, but anyway, does anyone know how I can verify if my A/C was factory or dealer installed? I am not the original owner of my car, so I wouldnt know the answer, but I am hoping that there is a way to determine this by looking for a tag or sticker somewhere. If anyone knows, I would really apreciate it, thanks.