SBC 350 motor. went on one of those super slow miserable cruises at hot august nights in Reno, 1 MPH for 1.5 hours. no overheating made it great. then when I got back home I could hear what sounded like a water pump squeak... however I wasn't leaking any fluid and if I hit the accelerator enough it disappears. I took both belts off and started the car. still has the squeak. now I am a little more worried. it can't be the alt. or A/C, it isn't the belts, and it can't be the water pump. so who has EXPERIENCE in something like this??? what is the most likely culprit?