Was it private effort? Who build it? Any more details? Was it Lancia chassis and Lancia engine?
As we know Vincenzo Lancia was talented driver, but when it comes to racing his own cars there was big "NO"...
The race was one of two other races held simultaneously with the Vanderbilt Cup, the races starting at 30 minute intervals. There were only 6 entries, this Lancia, 2 Coles and 3 Abbott-Detroits. The race was for commercially available cars of 161ci-230ci capacity. All the cars in the race have stripped bodies suitable for racing, so I imagine the "stock" part of the rules related to the engine and chassis.
I have no other information - presumably this was a private effort. Maybe Knipper was the agent for Lancia in the US ?