Over the last few months, the CarBuzz spies have snapped a very high-performance Mustang with a soft top. It was the car we thought would come to market as the new Shelby GT500, though it wasn't clear if Ford was planning to use that name or go in a different direction. Now we know exactly what this hot Mustang is, and we just got our best look so far at it. Supercharged Mustang Convertible Returns CarBuzz/Valnet This car isn't the GT500 convertible, though it's pretty much what you'd expect it to be. This is the convertible version of the Ford Mustang Dark Horse SC. It has basically the same 5.2-liter supercharged V8 as the previous-generation GT500, with an output level somewhere between 700 and 815 horsepower. Ford hasn't shared an exact figure yet. And like the Shelby that came before, this one has massive brakes and a track-ready suspension.How do we know this is a Dark Horse SC convertible? We can spot the same vertical exhaust tips as you see on the coupe. Any design elements that aren't hidden under the camouflage are a match to Dark Horse SC. So call this the new Dark Horse SC with unlimited headroom. At least when the weather is nice.Strangely, Ford doesn't offer the standard Dark Horse model as a convertible. That makes it odd that we're going to get the supercharged one equipped that way. Maybe the supercharger's extra horses blew the top right off?CarBuzz/Valnet We know Ford isn't afraid to go topless with its most muscular Mustang models, it's just been a long time since the company has done it. The last time was the S197 Mustang, two generations ago. Ironically, that's when the modern GT500 was born, bringing the nameplate back from the dead as it ran from 2007-2014. Now that GT500 is gone, convertible is back.Why did Ford take a generation off, not selling the 2020-2022 S550 GT500s without a roof? At the time, Ford said it was too much power. Without a roof for support, the body couldn't handle it well enough to handle like the Shelby should.What has Ford done to make the new car stronger? We don't know specifics, but the S650 chassis is newer and revised from the previous-gen pony car, so Ford may have found some added rigidity. The Dark Horse SC coupe also has a magnesium strut tower brace and uses forged instead of stamped suspension links. The convertible could get a few other reinforcements, helping to explain why it is still testing. With The SC's Price Already A Shock, How Much Will This Cost? CarBuzz/ValnetFord shook the automotive world a bit when it announced Dark Horse SC pricing could push $170,000 with options. It starts just over $103,000, whereas the last Shelby GT500 started from more like $80,000. It's a big increase for sure, but it's also far less than the bonkers Mustang GTD. It's not a case of whether the convertible will be more. Rather, we wonder how much more?On a standard Mustang, ticking the box for a convertible adds around $5,000 to the price of the car. That at least gives us a place to start. We'll expect that to be a lot higher for this car, though, especially if it needs extra chassis reinforcement.We expect that Ford will debut this model sometime in the summer. If the power doesn't turn it into a pretzel, at least. Here's hoping that Ford will be able to nail down the power figure by then, something it hasn't yet been willing to do.Ford Mustang Dark Horse SC Convertible Spy Photo (3)