Whenever we look at a stone-stock '68-'70 Shelby Mustang, for example, we have to wonder just how intoxicated the assembly worker was when he or she installed the SHELBY letters on the decklid.

The original Ford Mustang was one of those, of course, and the “new” Ford Mustang is also, as your reviewer Brian Thevenot notes. Pondering how Ford might redesign the Mustang for its 50th ...