list of Impalas of the same generation (with role) on the site:
http://www.imcdb.org/vehicles.php?resultsStyle=asImages&sortBy=4&yearFrom=1961&yearTo=- 1964&makeMatch=2&make=chevrolet&modelMatch=1&model=impala&modelInclModel=on&modelInclChassis=- on&mk=&origin=&madein=&madefor=&role=9&page=1
none seem as famous as the others on the pic...
maybe it is just for the "american car" theme