I agree with him on optimizing what you have, but that Roadrunner is far from stock. He does mention that the car is scienced out, more like scienced out to the nines. There are every other spring in the seats removed, lawn tractor battery in a large plastic battery case, drain back tubes inside the block with oil blocked off the cam tunnel. Weight is pulled out of the car everywhere you can think of and then some, all so they can put it at the rear of the trunk. Not illegal, not wrong, but also no where near the same as a show car sitting in the grass at Carlisle.
It is awesome the times they can get out of these cars. I love it, Hellcat my a$$ these will pace one of those down the track. Of course money wise they are about equal also.