Cap loose on the dist alignment pin? If the cap was moving around on the dist housing, that could chirp.

I would also be sure your not hearing an exhaust pipe rubbing against something or a clamp not tight enough. Sometimes noises travel through parts and sound like they are coming from one location when in reality they are coming from someplace different. An automotive stefascope (I give up trying to spell that ) will help locate the source of the noise. Gene