The dyno his youtube clip shows the car been run on is a mainline dyno - same as you have your car dyno'd on at MPC.
So provided all the right details were put it, it should be fine.
I could write an entire topic on the differences between most dynos and how to fudge the numbers on each of them, but thats not the point.
look, the only part of his system vs power i struggle with is the exhaust manifold, but the basics are there so it's more than possible.
Your a very clever guy Angelo,and you have experience than anyone else here in regards to rotrex superchargers, so i'm not going to debate your doubts any further, but i'm sure you can have better things to contribute to this forum than hanging **** on anothers hard work and money, especially on a car that has been built for the mostpart in a very similar way to yours - a whole car improvement, with a high regard for oem parts, both custom rotrex supercharged motors, both with all areas of the car overhauled/improved or refreshed.
Just my two cents, by no means am i having a go at you, i'm just voicing how it's coming across.