Okay, I've found a post where I quoted from the SMI statement. Hopefully I can work from the quote to find the actual announcement. I don't know about my ability to search Twitter, Facebook, or other social media so hopefully the actual announcement is out there somewhere.
I agree about the undertray/diffuser on these Nascars. That 'Car & Driver' article that SOI linked said the diffusers will be track-specific, which I had not heard previously. But the next gen Nascars have so many other levers that can be pulled to create the desired style of racing. I think we...
racing-forums.com
"The stated goal from SMI director of operations Steve Swift and track president Brandon Hutchison is to break the mold of so-called cookie cutter mile and a half tracks by creating something that
more closely resembles the racing product at Daytona and Talladega each year."
EDIT: Okay, the line I quoted above is from a Matt Weaver story on Yahoo Sports:
Speedway Motorsports Inc. wants Atlanta to become a pack race like Daytona, Talladega.
currently.att.yahoo.com