installed new brake light switch onA833

had it out twice for 10-20 min last couple days - all seems OK when driving, shifts and pulls good etc. - when stopped w/clutch in idling, sometimes I get the whirring sound, then I shift into neutral and let clutch pedal up and noise goes away when pedal comes about 1/2 way up. Suppose I'll avoid driving it and look for a local shop that works on these older cars - some of guys at the cruise-ins might recommend one for mopars..