I have a 94 gt convertable. I just bought the car a week ago. Mods that I can see so far.... exhaust from the headers back. (no cat) Aftermarket throttlebody K&N filter on the factory intake MSD box on mounted on the firewall and distributer underdrive pullies Nitrious dry kit (150shot set up on it-- I won't be using it though) Auto... I think 410 gears. miles are unknown odo stopped at 130K temp gauge runs little less that half and will creep up to half way and more when cruising around. I had this same problem with my last 94 gt. I never figured it out on that car. Water level was good. Thought it might have had air in the line(nope). changed the thermostat. still doing the same thing. any thouhght before I put a new water pump on it?