I haven't either, and I have the Jaws 2 Log and the new Making of Book. That pic of Scheider and Szwarc shirtless looks like a before and after dieting promo.
Speaking of Scheider, the article with the headline "I bitterly regret making Jaws II" has his age as 42. He turned 45 before the movie started filming in 1977.
Incredible that he gave such a negative interview DURING filming. No star would ever do that today. Brad Pitt did for The Devil's Own but very quickly backtracked and said he was talking about the filmmaking process, not the actual movie.
Can't believe the paper spoiled the ending though, with the photos of the shark being electrocuted. That must have been annoying for the studio and everyone involved to see.