HELP!! need experts advice on 440 trouble.

I'm getting closer to a cause...I think. I found that when I pull #4 plug wire the noise goes away...that was cool. I also picked up on a "chirping" noise coming out of both exhaust pipes...I have no idea. And....last but least, condensation drips from the exhaust joints behind the mufflers...it was 91 here today so the "cold exhaust system/hot exhaust gas theory" don't really fit. Anybody ever feel like throwing a hand grenade into the back seat of their car and getting some marshmallows? One head bolt was checked from each side after break in and it they were tight...short block source told me that would be fine. If I found them needing torque then I should go through all of them....maybe a mistake. Does any of this help???