Saw something on my news page that Google was showing 2 different new pages on the ford site for 2017 GT500, Looked and sure enough was true, also says 5.8L in brief description under the one link. I took screen shots.
"Something interesting happens when you type “GT500” into Google’s search box.
One of the first items to show up is “2017 Ford Mustang Shelby GT 500 | The Cobra of Performance Cars” as an item on Ford Motor Company’s [NYSE:F] website.
Clicking through the link takes you to the 2017 Mustang landing page.
If accurate, it means a new Shelby GT500 could be landing much sooner than previously thought—as a 2017 model instead of a 2018.
Prototypes for the car have been spotted near Ford test centers in Michigan. The vehicles suggest that the Mustang range-topper will get a unique front section with an aggressive splitter, widened track and power bulge on the hood.
The prototypes also wore massive Michelin Pilot Sport Cup tires and beefy Brembos with cross-drilled rotors. The rear of the vehicles matched the design of the Shelby GT350R but with a larger wing mounted to the trunk lid."
Like I posted before, was going to be a 2017 release for the GT500 anniversary but they ran into some engineering issues. Look for a limited 2018 1/2 release followed by a full model year after that.