I had the car dyno tuned. It's a stock longblock except for an aftermarket camshaft. Stock HP is 425HP and I thought it was making between 475-500 at the crank. It made 406HP at the rear tires, which comes out to approximately 480 at the crank. I think there is some more left in it, but it really won't hook up as is. It's the most fun I've had driving a car.