Big muscle from its 5.0-liter V-8 will become top performing Mustang From the golden age of muscle cars in the late 1960s to the golden age of power, Ford announced today that the Mustang Mach 1 is roaring back to life with a debut expected this spring. And that should mean soon, with the official start of summer on June 20. No specifics were shared, except that it will have a naturally aspirated 5.0-liter V-8...