The result is 350 horsepower apiece for a top speed ... from the Riva can still be seen in the Ferruccio Lamborghini Museum in Italy, but unfortunately wasn't available for sale for this project ...

This rare 1990 Riva Ferrari 32 speedboat is going up for auction in Monaco this month, complete with Testarossa styling and twin 8.0-liter V8 engines. And it could be yours for the price of a new ...