If you want to get right down to it, the Charger is the only RWD V8 car in the series. If they WERE to race the cars in truly stock configuration, it would go Charger, then a toss-up between the Monte and the Camry, then the Ford. Well, wait, I forgot about factory speed limiters, so the Charger would be trailed by the Monte, with the Camry over the Fusion.
BTW there are NO production pieces used on any car anymore, in fact with the template cars, a lot of the sheetmetal is essentially the same across the brands. And when the "Car of Tomorrow" phases in, NASCAR is going to become essentially a spec class. I'm almost glad Dale died before he could see whats happening with NASCAR.
"I have a hammer! I can put things together! I can knock things apart! I can alter my environment at will and make an incredible din all the while! Ah, it'* great to be male!"