The interpol was sold as a law officer bike, but there was a road model and of course the race model. If I'm not wrong it was with the sponsorship of John Player Special. In my opinion, the Norton had the best looking rotary engine of the bunch. That bike was not that hideous.
Back to the original topic, I would have any V-twin Guzzi anytime, even the ones of the DeTomaso era. The V7 Special is a great race bike, but just about 200 or 300 were built.
Raul