this would periodically based clothes - pinstriped suits - probably unlikely to be replicated for a film opening n detail, at least, however would be a good idea if it could be done with accuracy.
here are the videos we watched:
http://www.youtube.com/watch?v=iJ2RofOEAEU
http://www.youtube.com/watch?v=V4nUFxsZqpA
http://www.youtube.com/watch?v=5_RcT9qCCFo
Media Language
the media language in the goodfellas i.e the terminology used in the film is based around traditional italian american accents and sounds - which emphasizes the authenticity of film as a whole.
Convention
Goodfellas, The departed and the Godfather all follow traditional Gangster convention