Sure thing Lou Cazale was superb indeed

I remember reading somewhere that Coppola wrote a bigger part for Cazale in the second Godfather after seeing Cazale's superb performance in the first in spite of not a lot of screen time

The Godfather at 50
The New York Times by Dave Itzkoff March 9, 2022

  • Al Pacino on ‘The Godfather’: ‘It’s Taken Me a Lifetime to Accept It and Move On’
Who from the movie doesn’t get enough credit for their contribution?
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John Cazale, in general, was one of the great actors of our time — that time, any time. I learned so much from him. I had done a lot of theater and three films with him.

He was inspiring, he just was. And he didn’t get credit for any of it. He was in five films, all Oscar-nominated films, and he was great in all of them. He was particularly great in “Godfather II” and I don’t think he got that kind of recognition