New Camaros are a uni-body construction, not a full frame vehicle, so it would certainly take some slicing and dicing to put a Challenger on top of them. I also think you would play heck getting all the GM electronics to play with Mopar engine and drivelines...unless you plan on leaving the LS driveline intact.

Firm Feel, Hotchkis, and XV have all done pretty extensive research on how to get significantly improved handling out of the stock based systems. If you simply want a cruiser that is fun to throw around, I think any of these can achieve that goal for significantly less headache and expense. Creating such hybrid mashups of old and new tech, much less crossbreeding brands, are never a good return on expense vs achievements unless you are using it to demonstrate your capability as a shop.