Didn't mean to get 'smart' or anything - sorry 'bout the lack of info. - I initially thought all turbo 400 cases had this plug - and actually my next question was what it was for? Maybe this case was set - up for ?? something else - the case is beefed up around this hole and it looked like a standard 'stamp' of the case - at any rate - I will talk with the rebuilder tomorrow - thanks for the suggestions - I really do - appreciate it. Another case - of thinking there was a simple solution.