I don't know of a website like that specifically, but there may be one out there. There may also be information like that at http://en.wikipedia.org/wiki/Main_Page .
The Big Boys were built around 1945, and were completely replaced by diesels about 1960. You can still run one in modern times if your railroad is fictional.
Union Pacific is actually still running one of their Challengers (#3985), so that one can be run realisticly on a more realistic railroad.
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Does anybody know a website that tells a trains lifespan? Like the 'Big Boy' was from what year to what year? Could it be used on a modern line?
thanks, stephen
Just think it could be worse.