Well, I googled "Arcadia-Craft" and came up empty. It does look about like the CSS Arkansas. Here's a link to some pictures of her: https://www.google.com/search?q=css+arkansas&client=firefox-a&hs=PhX&rls=org.mozilla:en-US:official&channel=sb&source=lnms&sa=X&ei=h-F2U-2rMYSRqgbamYLgDw&ved=0CAcQ_AUoAA&biw=1920&bih=891&dpr=1 .
Click on "Images" at the top of the page. I'm not a Civil War buff, but I question whether any of those plans on that page are genuine primary sources. On the basis of the pictures, though, it looks like the hull and casemate of the kit are about right.
I'd be concerned that the hull appears to have been cut out of pine. That's a nasty wood for a ship model. It's soft, and over the years it's likely to secrete sap right through the paint. On the other hand, a person could cover it up with "iron" sheathing (maybe styrene strip?) so none of the wood was exposed to the paint....But if I were taking it on I'd probably replace the hull and casemate with basswood or poplar. They appear to have been cut out of a board with a bandsaw; if you don't have one of those, a fretsaw would do the trick.
I can't tell enough about the fittings to comment on them. But it looks like the basis for a serious scale model may be here.
Over the years quite a few "cottage industry" kits have produced models of Civil War ships - and still do. It looks like Arcadia-Craft was one of those companies. I can't recall having heard of it before, though, and I have no idea what the date of the kit might be.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.