The engine was built by Cobra Automotive, probably one of the best current engine builders around. Their motors for the race Shelby GT350's run north of the 530 HP routinely. The driver in the video is Jim Pace, he does quite a few in car videos in various cars.
This isn't a great video, but it gives you an idea of what a stout motor Cobra Automotive builds in to their cars.
VIR:
https://www.youtube.com/watch?v=LpGYgwYChMU