- Al Pacino was originally cast to play Robert De Niro's role but left to star in Godfather, The (1972). After De Niro replaced Pacino, he went to Italy for 10 days to research for his role.
- This movie was supposedly based around the life of Joey Gallo, a New York gang leader. Word has it that the members of Gallo's crew wished to seek vengance on the writers.
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