This is the arrangement shown on the Part Plates in the V8 parts book, but it is extremely rare to see as it was used only on V8 cars with TL and without power brakes.
Realistically this would only be 55 Super, and 56 Deluxe and Super, but nearly all of those cars had power brakes, and for the ones without, it's likely that TL would not have been equipped.
The production timelines are also tight, as any such cars would have had to have been made between 6/1/55 (optional on Super) and 5/1/56 (standard on all).
It's also theoretically possible to find this on 55-56 Customs, as it is known that some were built without TL, but it would be extremely remote as there's no chance that a dealership would spec a higher trim level without the cheap and popular power brake option, and likewise it's hard to imagine that anyone would order one custom like that, not to mention that only a couple % were built without TL in the first place.
View of advertisement for Packard cars, showing a Packard car for each year from 1899 through 1956. Caption reads: "Over 53% of all Packards built since 1899 are still in use." Typed on back: "For immediate release. Back in 1938 when more than half of all the fine cars built in America were Packards, the Super Eight, on the right, was the ultimate in luxurious family motoring. Although a large car for its time, families still had to 'travel light' by comparison with the luggage-carrying capacity of the present Packard Caribbean, left, the company's new luxury sports convertible. American styling, which has made this country's cars the largest, most comfortable in the world, has provided larger trunks, wider seats, and still made cars lower and more streamlined. From Public Relations Department, Studebaker-Packard, 1580 E. Grand Blvd., Detroit 32, Michigan."
Item #: na030077
Photo courtesy of the Detroit Public Library, National Automotive History Collection and used with permission.
Just gave the old girl a quick washdown while still on the trailer after moving her from Kentucky to Florida. Inherited her from original owner. (Great Uncle -> Mother -> Father -> me)