You can make any body that you want. Submit a design to NHRA for approval, then have at it. Remember when Tasca and Outerlimits Offshore Powerboats a few years back made their own Mustang?
So if you have the budget and the capability, then go for it. At this time MOPAR wants the Funny Car to be a Charger and they're paying the freight, so that's what they are. If DSR wanted to build a Challenger FC they could certainly do it, but they would do it without the financial support of MOPAR. So if it was you, what would you do?
The Challenger is the MOPAR car of choice for the Factory Stock Showdown.
That's the answer I was hoping for. I've heard lots of conspiracy theories from other fans but agree that if someone's footing the bill, you run their bodies. I guess I'm still stuck in the mindset of attracting sponsors and fans by doing something that stands out from the sea of nondescript, shapeless cars. But I agree that racing is first and foremost a business, for better or worse and as a business it wouldn't make sense. But still a Challenger F/C would sell a ton of t-shirts....