The DeSoto brand briefly occupied an odd spot in Chrysler’s portfolio. Introduced just in time for the Great Depression, DeSoto was first priced below Chrysler’s own Dodge brand, and then above it. By 1961, the DeSoto brand was terminated due to redundancy…though not before offering some collectible, if somewhat obscure cars.

The one-of-none DeSoto Adventurer Convertible with dual-quad HEMI V8 power.

The 1956 DeSoto Adventurer, which was based on the Chrysler 300 chassis, was never offered in convertible fashion. But that didn’t stop an unnamed car modifier from taking a ‘57 Chrysler 300 convertible chassis, and converting it into the ‘56 DeSoto Adventurer droptop that never was, but clearly should have been. Hemmings Auto Blog reports that this one-of-none DeSoto will head to RM Auctions John Staluppi auction at the end of November.

As DeSoto struggled for an identity, Chrysler was minting cash off of its well-received line of 300 automobiles. These large luxury coupes are often cited as some of the first real American muscle cars, thanks in part to their massive HEMI V8 engines. Thankfully the builder choose to include a 320 horsepower, 341 cubic-inch dual-quad HEMI V8 engine in this DeSoto droptop.

This DeSoto also includes the pushbutton PowerFlite automatic transmission, heavy duty suspension, as well as power windows and the Hi-Way Hi-Fi underdash record player. All of this, in an awesome and unique ride that you simply can’t find anywhere but the imagination of old Mopar fans.

The pre-auction estimate sees a sales price of $150,000 to $200,000 for a car that never existed in the real world…unit now. How cool is that?