How Motown, Martha and the Vandellas, and the Ford Mustang wrote music history

A classic snare riff kicks it off—bah, bada bah-bah bah-bah bah-bah—and a chugging, urgent bass line propels the song forward. Three young women pop out from a wheel well, radiant in skirts and hair bands, beaming smiles and their hit song to a national network-TV audience. The bottle rocket that was Motown had taken flight; their…