833 clutch rattle 66 Dodge Dart

Toolman, mine goes away too, w/pedal pressed in ever so slightly. also goes away while under acceleration. Like I said, it sounds like holding a stick against fan blades. Rythmic, very loud clatter. In neutral, giving some gas, it gets louder and louder while increasing w/rpm's. After the fits I had w/this install last Summer, [car was off road most of season], I am fit to be tied. If this isn't a "simple' fix, I don't know what I'll do. Can't sell it like this....Like I said before, everything seems to function as it should. This noise is def. not something to be ignored. It got SO much worse today...Thanks for your help, as I recall you helped me on the install last summer, too.