Yes...my mistake. I forgot your ship was different from the others.
The Navy had a lot of those things. The JFK was a single class of ship.
My dad was the XO on the USS Bristol, a variant of the Sumner Class that had an extension inserted that gave it more fuel and made it longer. The Navy made this decision in 1943 while the Bristol was being built, and they couldn’t extend her, so she couldn’t be part of the Gearing Class, and...she wasn’t strictly part of the Sumner class, so...she was stuck in the middle, and is generally referred to as a Sumner Class. Her hull number, DD-857 was completely out of the numbering range of the Sumner Class.
I found that trivia fascinating! US Navy ships are full of that kind of thing.
I’ll have to look her up on navsource.
That ship, the Bristol was finally scrapped in 1993.