i would hate to even guess, @ 2200rpm 425 ci would give around 140hp, if you did a cross flow head and some head work... I know of a 310 that has been hard blocked and a little stroke to it, it has a cross flow head, fuel injection, but the timing gear on cam twisted off.... That would get you some good parts, but you really need a billet cam, or it will break again...
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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