Though this car isn't seen much in the US, I do know about the Chevrolet Opala. It's style is a mix of the Chevelle and Nova, and it used a "250-S" straight-6 as the top-of-the-line engine instead of a 350 V8 found in GM's American Muscle Cars at the time. Dispite the smaller engine, it wasn't slow. In fact, it was the fastest Brazilian-Made car at the time!
I like it. Looks like it'll be a fun car to tune for racing, or simply cruise around in it.
I say that they should bring this to GT. Add a bit more variety to the Muscle Car class by not only having American Muscle cars, but some Brazilian Muscle cars as well!