Sam McGee, 48, an owner of a wealth-management firm who lives in Boerne, Texas, on his family’s 1968 “Passionate Pink” Ford Mustang, as told to A.J. Baime. When I was 14, my dad and I ...

With the track-prepped Dark Horse and the unhinged GTD road racer, Ford clearly wants us to take the S650-generation Mustang seriously, but it's equally keen to stress that the GT version is ...