It seems to be an interesting idea !
I'm not too fond on oval racing myself, but I wish you bonne chance for the organisation
Semi on topic:
Ovals and road racing are fundamentally different. Road circuits are mainly focused on the technique of the driver, while oval racing is more about the tactique. Being able to take the right stream, take risks while passing, being confident in your team mates and your opponents are aspect that are, even if resent in road circuits, the fundamenals of oval racing.
The funniest part in racing on ovals at high speed is that you get to have close racing all the time. And it is quite hard when you take a no-downforce-no-slicks car (XRT or LX6 are quite hard on bend 3), because you actually have to brake sometimes.
As a result, road circuit racing is emphasizing the affinity between the car, the driver and the track, while oval racing is more focused on having a symbiosis with the rest of the pack.