[Arran]

Except that Studebakers usually used Philco radios too, and the 1957-58 model Packards were basically the same as the larger Studebakers. Any Packard owner will tell you, cutting corners was not a consideration at Packard, such as when G.M, Ford, and Chrysler started poking their exhaust tips through the rear bumpers on some of their models, which were notorious for rotting through the bumper, Packard used stainless steel for the tailpipes, as well as the fittings through the bumper. It was purely an executive decision at marketing, Wonderbar radios were used in Cadillacs, and other higher end G.M products, Packard was a competitor to Cadillac for many years, and Packard was trying to go with what they thought was upscale.
 Packard's issue was a lack of management, they were the last of the high end cars to receive an overhead valve V8, in 1955, they thought that V8s were a fad and stuck with an L head inline 8. Cadillac had an OHV V8 in 1948-49, Chrysler/Imperial in 1951, and Lincoln by 1953, so they were really being left behind by then
Regards
Arran