Ford built the Boss 302 for exactly one reason, and it had nothing to do with street driving. Handing that same high-revving, solid-lifter engine to a Mercury Cougar looks almost like an afterthought, yet that is what happened once the Eliminator package took over as Mercury’s performance flagship. Only 469 Cougars were built with it. This Competition Gold example is documented as a one-of-one. Read on for how a country-club coupe ended up with a race engine.