I need to know if there are any differneces between a stock T-5 and a "World Class T-5". I know they are different as far as their internals, but what about on the outside? Part number, anything? I am asking this because I am about to by another Stang. The tranny was "replaced" but forth gear's synchros aren't functioning properly. Also, how tight are King Cobra clutches supposed to be? I ask this because when I test drove the car, it was really tight, almost too tight? Any help would be great, thanks!!!