4 6 - year - old ▁Mitchell ▁succeeded ▁him ▁as ▁General ▁Mot ors ▁Vice ▁President , ▁St y ling ▁Section . ▁Mitchell ▁set ▁out ▁to ▁break ▁with ▁the ▁sty ling ▁c ues ▁used ▁under ▁Har ley ▁Earl , ▁wanting ▁to ▁eliminate ▁chrome ▁excess , ▁fat ▁fins ▁and ▁similar ▁signature ▁marks . ▁▁ 1 9 6 0 s ▁ ▁In ▁the ▁ 6 0 s , ▁Mitchell ▁promoted ▁what ▁he ▁called ▁the ▁" she er ▁look ," ▁a ▁more ▁aer od ynamic , ▁" should er less " ▁drop ▁off ▁from ▁a ▁car ' s ▁windows ▁to ▁its ▁sides . ▁ ▁Mitchell ▁gave ▁G M ▁design ers ▁the ▁assignment ▁of ▁combining ▁Roll s ▁Roy ce ▁and ▁Ferr ari ▁sty ling ▁c ues ▁to ▁create ▁Bu ick ' s ▁classic ▁ 1 9 6 3 ▁Riv iera . ▁According ▁to ▁a ▁popular ▁story , ▁Mitchell ▁got ▁the ▁idea ▁for ▁the ▁Riv iera ▁in ▁Paris . ▁He ▁had ▁originally ▁en vis aged ▁the ▁design ▁for ▁Cad illa c ▁Division , ▁as ▁a ▁new ▁La ▁S alle , ▁" a ▁baby ▁Cad illa c ". ▁The ▁Riv iera ▁also ▁featured ▁fram eless ▁glass ▁in ▁the ▁front ▁doors , ▁giving ▁hard top s ▁an ▁even ▁sle ek er ▁look . ▁ ▁An ▁encounter ▁with ▁a ▁sh ark , ▁while ▁skin ▁div ing ▁in ▁the ▁Bah am as , ▁inspired ▁Mitchell ' s ▁Cor v ette ▁Sh ark ▁show ▁car , ▁his ▁St ing ray ▁rac er ▁and ▁the ▁production ▁ 1 9 6 3 ▁Cor v ette ▁St