Hi Nick,
You might want to edit the post title from "loin" to "lion", just saying.
It's a nice kit. She was a Balao class, those are rare in the plastic model world as compared to Gato boats. Not a lot of external differences that matter. Pampanito in San Francisco is a Balao, if you get out our way. In fact there's some debate about the fairwater of the kit being a Gato, etc.
Every USN Fleet Boat in WW2 was a little bit different from the next, and they got modified.
Probably the most famous Balao was Tang, a Mare Island boat that was second on the list of tonnage she sank. She sank herself with a circular-run torpedo. But quite a few of the crew survived that.
Like many models, this one is probably a result of the boat being in a museum.
There are all kinds of aftermarket parts available. But the kit builds up well as is.