Did De Niro add the black girlfriend?
Was she in Palminteri's original play or is it De Niro's idea? (given his penchant for black women)
Also I've read this is autobiographical, but it's not really a true story, is it? I wouldn't have thought so because the storyline is a bit too neatly wrapped up (C saves Sonny, Sonny later saves C, Sonny is killed by the son of the man he killed, but had that incident never happened, C wouldn't have become friends with Sonny and would have ended up burning to death in that car with his friends...)