Hey guys, not much experience with cars yet, this is my first real car that I am going to work on myself. I have an 80 z28.

Anyway, here is my issue. It doesn't happen all of the time, and it's usually shows itself after I have been driving for a bit. But I hear a rubbing (i guess that's the best way to describe it), sometimes when I am sitting with the clutch depressed at a light. I will also hear it sometimes with the car in neutral sitting in my driveway after going for a drive, I kind of have to listen for it because it is not always loud. Is this a symptom of a worn pilot bushing? or something else? Sorry if the noise wasn't descriptive enough, I guess I'm not really to sure how to describe it.