I have an '89 GT, all stock. I recently had the clutch replaced. When I got the car back, it was making a squealing/chirping noise when the pedal was fully released, and your foot was on the gas. If I were to rest my foot on the clutch pedal very lightly, the noise went away. Obviously I wouldn't do that because I don't want to wear out the clutch. I took it to the mechanic, and he said he adjusted it, but the noise is still there. I went to a different mechanic and had the fluid in the transmission changed, but the noise persists. Any ideas what it could be? Like I said, the chirp is present when your foot is on the gas, and the clutch pedal is fully released. If you lightly tap the clutch, the noise disappears.
It sounds like the throw out bearing is on it's way out. Also, when your clutch was replaced, was the throw out bearing replaced as well? Was it with something other than a Ford part? I've heard that some of the chinese throw out bearings that come with clutch kits can squeak pretty quickly, and that the Ford ones don't.