John Calnan. That name brings back a ton of memories. He did a lot of World’s Finest stories including a few with the Super Sons. He also did a multi issue “Who Killed Batman” story from 1977 that I love.
I remember the Kent stories well. The Neal Adams story always surprised me. He seemed like an odd choice for a backup story featuring Clark Kent. Pretty cool though. I thought the stories were nice just because they showed he wasn’t flying around or at the Planet all the time. He relaxed like everyone else.