We found this old newsreel clip from 1936 about Percy Hunt of Buffalo, N.Y., who built a powerboat around a Chevrolet car body, using the original 6-cylinder car engine as the boat motor.
It seems Hunt was a car salesman who combined two passions into one.
https://www.youtube.com/watch?v=esX8pxyAJaA
Passengers enter the cabin through the removable trunk door. The front vent window works well to knock down bow spray.
“No hills, no stoplights — a boater’s paradise. Just one big boulevard,” the narrator says as the unique 35-foot wooden boat cruises at 18 knots across Lake Erie. “What a perfect car for the streets of Venice.”