My former dealer Chapman Ford had 2 of the last MY Shelby GT350's (2013's)..... One sold about 8 months ago at $81k.... I'd still buy the run of the mill SVT GT500 over the (REAL) Shelby GT350, any day due to its better power, handling and looks. The SVT/or Shelby mustangs being tested in the Arizona desert and west of Phx in the suburbs and in and around Hollywood/Beverly Hills back from Feb 2014 to May 2014, has the dual tip mufflers/dual exhaust of the current GT500 (no it's not a quad exhaust, only two tip mufflers), and sounds much like the current GT500 but meaner, deeper... No hint of SC whine because I've heard them push 4000-4500 rpm on occassion, they def don't sound like a flatplane crank because that would make the car sound like a big V6, which is what happens to a 2011-2014 5.0 if you leave it stock but swap out the factory H-pipe for an X-pipe, the car sounds like it had its manhood castrated, sound like a big V6... Hence why I like big beefy sounds out of these V8's>> (H-pipe), not whimpy European sounding small displacement V8's which is what an X-pipe does to a mustang V8, makes them sound inadequate, small cubes. But yes this chassis will have a sharing role. It's a global platform. That alone should tell all it will be shared, somewhere at sometime. Carbon Fibre is rather cheap these days and should be used on the S550 and likely will on the SVT/Shelby replacement. But Ford is in trouble now since the news that one can order a mud-level Challenger RT with the 6.4L 470 hp motor now. Ford has nothing in the pipeline to compete. No power performance packages (Dodge offers this on the V8's, and NO they're not real Hemis), that come in 3 stages and range from 15 to 50 extra hp.