If you have a few spare hours (days?) this guy's blog is really worth a read! 
Finally finished reading his blog...

It's very entertaining and I couldn't help but marvel at his ingenuity in solving the many issues he had with this conversion as it wasn't as straight forward as many would think.
For one, the Goldwing engine rotates anticlockwise (as do many other Hondas) whereas most other engines rotate clockwise! This obviously complicated things when mating the engine up to the Subaru gearbox he used as that gearbox is normally mated to an engine that rotates clockwise.
I'm looking forward to reading his next instalment and viewing more YouTube videos of his little Wing powered Hillman Imp now that it's up and running...