Sounds like you've bought a Revell Buckley-class destroyer. The kit was initially released (as the U.S.S. Buckley) in the early or mid sixties. It's been back several times since under several names, including a couple of odd ones: the Nationalist Chinese frigate Tai Chou and the British H.M.S. Bligh. I don't believe the moldings ever got changed.
Plans of this class are fairly easy to come by. I believe The Floating Drydock sells several different versions. Maybe the best source for the modeler, though, is the book The Destroyer Escort England, by Al Ross, in the Conway Maritime Press/Naval Institute Press "Anatomy of the Ship" series. It contains lots of drawings of a Buckley-class DE and most of the relevant fittings (guns, radar, depth charges, etc.).
The old Revell kit is basically a nice one; the detail on some parts is among the best the plastic ship kit industry achieved during that "golden age." (Take a look at the superstructure bulkheads, which have such things as fire extinguishers and brooms molding on them.) The biggest problem, if I remember right, concerns the guns, which aren't up to the quality of the other moldings.
Gold Medal Models makes a photo-etched metal detail set for this kit. That should really dress it up.
Hope this helps. It's a nice old kit of a handsome ship. Good luck.
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