According to Mankiewicz"not a word from the Puzo script was used.
0
7
Donner, Tom Mankiewicz and Ilya Salkind have commented on the use
of Christian references to discuss the themes of Superman.
0
8
The Writers Guild of America refused to credit Mankiewicz for his rewrites, so Donner gave him a creative consultant credit,
much to the annoyance of the Guild.