People used custom hubcaps back in that time. You could also get them from other cars ie: Lancer, Cadillac, etc. A day 2 circa 1955? Depends on what part of the country. West coast nose dropped a bit. Custom caps, maybe a custom grille, dual exhaust, maybe cut outs, maybe a hotter cam, tuck and roll upholstery, pinstriping. East coast probably would sit level or maybe slightly dropped in the tail. Same stuff as above but with skirts, dual spots. Painted black steel wheels with polished or chromed lug nuts were big, but that might have been later 50's, early 60's. And a street car would have wide whites all around.