I did not know the "397" nugget was relevant to the 24 Hours of Le Mans.
Although "397" COULD refer to a 389 CID Pontiac Lemans GTO bored out 0.20 over or so . . . But that's a Goat of an entirely different type.
I hope this virtual endurance event is properly run and administered (no "do-overs" on practice laps, no cheats, etc.) to do justice to the legendary spectacle of the circuit.