HAHA, me again, well your asking questions at the right spot, plus...you live near me lol
, ok i had a rough idle, it is usually the IAB idle air bypass, get some throttle body cleaner and clean it, you will have to take it off, probaly a 15 minute job.
Hey which car show u go to? how could i miss that? anyway if those cars had a rough idle (especialy at a mustang show) your probaly hearing a radical camshaft, it's normal for a modified car to idle that way, which you probaly might know.