I think the real life Nucky ended up in prison by the late 30's, so they may want some flexibility with that.
Premiering September 19, 2010, a new HBO series entitled Boardwalk Empire fictionalizes the life and times of "Nucky" Johnson, along with other players, at the start of the Prohibition era in Atlantic City, NJ. The series is produced by Martin Scorsese and Mark Wahlberg and stars Steve Buscemi as Nucky Thompson, a fictionalized version of Johnson. Show creator Terence Winter elected to portray a fictionalized version of Johnson to give the writers creative license with history, and to maintain suspense. The series is based on the book Boardwalk Empire, by New Jersey Judge Nelson Johnson.