[Tommy]

Good info. If I were going for visual impact, I'd choose the supercharger. But for track use I'd prefer the NA engine for simplicity and reliability. The biggest issue for high HP engines is that they are typically optimized for the 3K-7K RPM range, making them less fun on public roads. Depending on your personal priorities, you could go for an all out, wide open throttle track beast, or something a bit tamer that is still tolerable for occasional street use. When building the engine for the multi-use Cobra I used to have, my guiding principle was to have the biggest, flatest torque curve in the range from 2500 to 6000 RPM.