Hi,
I both read the Godfather novel and saw the movies (uncountable often

) - and I always thought about, how much of the plot is really pure fiction and how much is taken from "real life".
For instance Johnny Fontane looks for me as being based on Frank Sinatra.
Any family the Corleones are based on ? Like the Gambinos for instance.
Any interesting reactions both the movie or the book forced from the true Cosa Nostra ? I heard the legend, that the first part was viewed by some major Mafiosi in NY - and they applauded. Any pressure the producers/actors/directors felt from the Mafia side while producing the movie ?
Thx for any further info