If you do a Forum search on the word "Kearsarge" you'll find quite a few threads dealing with the Revell kit; it's been a popular subject in recent years.
The official repository of plans for U.S. Navy ships (and Coast Guard, Army, and other government-owned vessels) is the National Archives. Copies are available, but the process of getting them is a little complicated and not cheap. (I confess I've never ordered any plans from the Archives myself, but I know it can be done.)
The Smithsonian Institution maintains a large collection of ship drawings - some original plans, some modern drawings that the Smithsonian commissioned (usually for building models - back in the days when the place did such things), and almost all of the drawings by Howard I. Chapelle that he made for his books. (He was for many years Curator of Transportation at the Smithsonian.)
I don't know whether the Smithsonian has any plans of the Kearsarge or not. But it's worth a look. I'll take the liberty here of pasting some info that I typed for another Forum thread:
"Here's the link you need: http://americanhistory.si.edu/csr/shipplan.htm .
"Unfortunately the process of ordering Smithsonian plans is a little complicated. The first step is to order one of the catalogs described on that website. (You want the collection of warship plans.) The catalog contains the necessary information to order the actual drawings.
"The good news: the Smithsonian has a pretty good reputation for service of such requests. (Caveat: I haven't ordered any plans from this source for quite a few years. But I have the impression that most modelers have gotten good service from the Smithsonian.) Other good news: those catalogs are fascinating things in themselves - great wishbooks, as well as sources of information."
This may be a slightly dirty trick, but here's a link to a photo of Donald McNarry's model of the Kearsarge, on the scale of 1/16" = 1' (i.e., half the size of the Revell kit): http://www.donaldmcnarryshipmodels.com/22.html .
Like I said, that may be a dirty trick. I make it a point to avoid looking at McNarry models when I've just finished a session in the workshop; he makes me wonder why I bother.
Hope that helps a little. Good luck.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.