A chance encounter with a brand-new Oxford White 2014 Mustang GT while cruising in a 1987 5.0 turned into an unexpected lesson in just how far Ford’s small-block had evolved. The Fox-body’s 225-horsepower pushrod V8 and the Coyote’s 420-horsepower DOHC screamer share a name and a displacement, but almost nothing else under the surface. What one owner discovered comparing them side by side says a lot about a quarter-century of Mustang engineering, and about the friendships that get built around cars like these.