First time down the track

Was the engine actually on an engine dyno, or is this a figure from various simulators? There are huge differences between a simulator, real engine dyno, and an engine in a car at the track. The track is the only truth teller. Weight the car, use the MPH. I'd say it's probably 100hp less than you think.
As a point of comparison - an E body with a 422", my ported 496 heads, hydraulic cam ([email protected]), 2200 convertor, with 3.23s runs 109mph on street radials, and is probably a solid 400lbs heavier.