There's really no reason it shouldn't be held on the oval. I don't know why you'd need so much power when the integra got around decently and I'm sure he could've made a few changes about his set up that would've made him get around even better. I'm not sure what kind of power he's making, but I don't think it's any insane amount for a GSR.
What I think is that it shouldn't be held on April 2nd and I think there should be better preparation. People practicing on the track with their cars, etc (if they're good enough).