It's a famous (or perhaps infamous) kit. I can remember building it when I was in about the fifth grade - and several times thereafter.
Revell and Renwal both released cutaway nuclear subs at almost exactly the same time. Renwal's was considerably bigger; it cost three dollars, whereas the smaller Revell one cost two. (Ah, those were the days!) A few years ago Revell acquired at least some of the old Renwal molds. The one you're talking about is the former Renwal kit.
They may well have been the biggest headline grabbers in the history of model building. Admiral Rickover, head of the nuclear Navy, went ballistic over them, claiming that the model companies were turning over secrets to the Soviets. Just what was actually going on there is unclear. The kit designers had worked from widely available published sources (e.g., Popular Mechanics magazine), and had filled in numerous gaps with their imaginations. They had no idea, for instance, how the propulsion spaces were laid out. Rickover surely knew, if he took more than a glance at the kits, that they weren't telling anybody anything that wasn't already public knowledge. Maybe he blurted out his gripes before thinking about them; he was known to do that kind of thing. At any rate, Rickover's accusations about the kits made the front page of my hometown newspaper, the Columbus Dispatch. Revell and Renwal rode the publicity all the way to the bank.
People who know more than I do about submarines say that these two kits bear scarcely any resemblance to reality. The reactors and engines, as I understand it, are pure fiction. And I suspect the other compartments aren't much better. But what an exercise in nostalgia! I remember in particular the blobby little people sitting on stools in the control room, and what seemed like an unbelievable detail: a rack of meat for the meat locker! And those little metal springs that fired the aftermost Polaris missiles! The biggest challenge was mustering up the patience to paint all the interior parts (with Testor's glossies, of course) before building the thing.
This kit is an intriguing part of plastic modeling history, and building it now would be great fun. Just don't make the mistake of believing that the inside of the real sub looked like that.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.