Power, weight, handling and driver. It can be broken down to those basic items and all of them need to be sorted to produce a winning car.

Mopars can produce the power - 650+ hp out of a Gen 3 is not a problem. We can make enough power. We don't need 750 hp if we can make weight. Stielow admits that he can't use all the power his car makes anyway.

Mopars can make weight - A sorted A Body is going to have about 200 lbs on Stielow's Camaro, if not more. Not sure about Brian's car, haven't seen a weight on that. I would hope that would be more on par with an A Body and be down under 3000.

Mopars can handle - Just look at the autocross results at the same events the rest of these cars are attending. E Max is right there, nothing unobtainable in that car and it's overweight and severely down on power. The Taxi is 7 seconds slower than Stielow at Gingerman on the 2.14 mile course. Yes, that is within reason with the car being down 250+ hp and heavy by 600+ lbs. Mopars are not getting beat at these events because they can't handle, or stop.

Driver - As far as the driver goes, you can't just go get a pro to wheel your car at these events. Even if you have the most power and the best handing, unless you can wheel it as well as the other people currently finishing in the Top 5 you're done before you started. Remember that Randy Pobst (a pro) flung a new AMG Wagon around Pahrump within a couple seconds of the fastest cars this year. The times are somewhere online, but that wagon weighs 4733 lbs and makes something like 577 hp. Overweight by 1500 lbs and down 200 hp, but still within the Top 10 in road course times. The driver is a significant portion of this equation.

So, until the planets align and get all of these things in the same Mopar, we will never know.