[cparman]

Typically Throw out bearings will make noise when the clutch is not depressed, and if you lightly push on the clutch pedal it will go away. I am wondering if the pilot bushing is a bit dry? The pi;ot bearing should be an oil light bronze bushing. Hope I spelled that right. Meaning that the bushing is impregnated with oil, and is self oiling. If it sat for sometime while you finished your build it could have become dry. I say drive it and see if it gets better from heat and use. my $.02 worth.. HTH