When Ford realized what a sales juggernaut the Mustang was in the mid-1960s, the it quickly set to work developing performance-oriented variants of the pony car to shore up its reputation among enthusiasts. Carroll Shelby and his team of engineers soon put the Mustang on the map with the GT350R and the road-going GT350 homologation car, and before the close of decade, Ford’s own Boss 302 and Boss 429 had joined the fray as well.

By then the Shelby had become a fast, feature-laden grand tourer, while the new Boss models represented the pinnacle of Ford’s own track-focused designs – both commanded serious coin in turn.
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