Carving a bit of time recently and resurrecting applications... This is the 1958 Thunderbird Sedan Delivery I wish I could deliver my art in. Porthole windows from the '57 2-seater would have been used in the pillars in the rear for some carryover panache.
Chevy could use a new Kingswood Estate in its Impala lineup.
Cadillac was showing much smaller dreamcars in the Fifties, including a coupe and convertible pair, the La Espada and El Camino from '54. Perhaps they were also mulling over offering the über Brougham as the tight 2+2 featured I illustrated above...