A 351!!!!!

Bob picked my car up thursday, and had the engine out by the end of Friday. He said that it was not in fact the original engine, as the two of us had believed, and that it was actually a 351 windsor. Well, I was floored, here I am, putting 289/302 equipment on a 351! So now I have to decide what to do with it. Do I sell it now or rebuild it and swap the engines out when I get it built?