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Hard to say what the specs are without more info like what heads are on it, etc. It could be a "run of the mill" Cleveland with 2V heads and 2 bolt mains or it could be a 4 bolt main 4V, Boss 351 or 351C CJ. If you can get some casting numbers from the heads post 'em here. There are some very knowledgable and helpful folks that hang out here.
Lots of places to get rebuild kits, P.A.W. Summit, Jegs, local speed shop...take your pick.
the 2's in the corners indicates thatthey are the 2V heads. to date i have not seen any 4 bolt main 2v clevelands. but having said said that, ford has done some dumb things for the stupidist reasons, but dont hold your breath.