It is an impressive build. I think one reason it makes some upset because it shows how even the most advanced of the stock G body powerplants is simply outdated along with most everything else in these cars. The other issue is it shows money can easily trump hard work, talent, knowledge, and skill, through those attributes are needed for gaining large sums of money beside inheritance. Also if indicates how hotrodding, like Christmas is becoming highly commercialized and that people can just pay to have hotrods built by shops that are probably superior than what many of us could do building it ourselves. The Grand Nasty is pretty much a Ringer.
However, I do have a few concerns regarding this car. Hopefully they used an aftermarket frame as even a reinforced stock frame can't handle that much power for long. Even factory built supercars with 1,000 hp require frequent inspections and even x rays as that much power causes a lot of stress and fatigue can happen fast at those power levels. Even a factory normal production aluminum LS block can be suspect at such a high power level and either a stronger aftermarket racing block or even a cast iron LS block would be better for such high hp and boost levels. Iron blocks deflect less than aluminum blocks and why they are still used in trucks and prefered for high boosting. Not to mention 1.5k hp is pretty useless on the street and as another poster said, it is just bragging rights. I doubt it could cross the country without making two or three major inspection stops for checking signs of stress and fatigue which would require disassembly. That much power comes with a lot of responsibility. I am not sure how responsible it is to push that much power through an outdated grandma car that was never designed to be a supercar?