People building specials is not uncommon at all in the motorcycle world as we all know. Let's face it the fitting of a Vincent engine in a Featherbed frame from an old single is not rare. A friend of mine built two Norton singles into a V-Twin mounted it in a home mede frame and he has that insured. How do we think Alan Millyard copes. After all he once built a kawasake that was, as I recall, a 48 cylinder engine and he also fitted V-10 Dodge Viper engine into a frame of his own design. I am sure you can all think of Manx, G50 and 7R engined specials and I once met a gut who had a Yamaha OW01 racing engine in a road bike. As a final example have you all forgotten the 4 cylinder Bantam which uses many parts from a Suzuki.
Long live the special builders.