Could still be a exhaust leak they sound alot alike. You should fix the leaks to help you pinpoint the noise. Pull the valve covers and run her warm.. check your valve motion and see if you can find what bank it,s coming from.I don,t know if you have polys or not so i would get a set before before you lash-em. I don,t think you pulled a stud is the motor missing? and it would knock all the time. try these things, and let me know i,ll help you all i can.
jeff
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"GTO? Good Times Only!!!" "Get Tools Out!!!"
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