Here is the reason I believe that R&D for Mopars is severely lacking: From the 80s all the way up until 2008, Mopar didn't make ANY 2 door ,RWD,V8 performance cars. Compare that to the millions of 5.0 Mustangs made. These cars are cheap and plentiful, whereas if you want to put together a nice little street/strip Mopar you will probably be starting with a car from the 70s or older. If Mopar had made a 318 powered car in the 80s and 90s with similar performance to the Mustang, I believe we would have a lot more choices in the aftermarket. Instead, Mopar concentrated on trucks and FWD.