I think the 57 was the favorite of most people.
IMO, the 58 looks like a fat-mouthed shark, lol.
I don’t like tail fins. But I do like fish mouth bumpers.
fishmouth bumper:
http://www.isra-online.org/images/Klinkefus_Steve-Marcia_Des_Moines_57Oldsmobile98.JPG
Double fishmouth bumper: