I highly doubt it. If it was the real thing it's worth well over a million $, not something that gets driven on the street or left to sit in a car park. Next time you see it just go up and tap it or feel the fender edge. If it's aluminum it's real, fiberglass is a repro.
You beat me to the aluminum check. I saw one recently that was carbon fiber.
As to some talk about fender flares, the Shelby 427 Cobra's had'em, the USAC 289's (which 'handled better' due to not so much weight in the front & less weight overall) did not. Today, an unrestored
original Shelby 427 Cobra for sale will start at over one million dollars. As these cars get older, inevitably a few will be lost from theft and forces of nature. Because there were only 998 Cobras built by Shelby American, to call them scarce is an understatement. For a long time, the AC Cobra prices were directly proportional to their Big Block brothers. The team delivered 655 AC Cobras riding on leaf springs with Small Block power. Considering the original AC Cobra prices reflect their leaf-spring chassis, the coil-spring design that underpins every Shelby 427 Cobra makes it much more confident over broken pavement. At the time of press, the 289 Shelby Cobra price is just shy of one million dollars. AC Cobra prices have stayed under seven figures because of continuation cars, so they will remain in the shadow of the Shelby Cobra 427 price. When you consider $7,500 for the Shelby Cobra original price, they are a great investment. As of March 2021, an original Shelby Cobra 427 price was nearly six million dollars. Shelby 427 Cobra: imagine incredible power, sound, heat, and vibration in one package. It turns well for an old car, but you really feel the 600-lb engine as the center of gravity. Being so nose-heavy, plan your maneuvers well in advance, and be ready for adversity. A 5-point harness and a helmet are recommended. The Shelby 427 Cobra was only available with a manual transmission. Ford’s Top Loader 4-speed is nearly indestructible, and the hydraulic clutch linkage was easy to modulate. Beefy synchros can be felt through the shifter, and the close ratios make it easy to drive without using the clutch. Aside from adding carpet, the original Cobra interior was carried over from the AC Ace. It offers two leather seats without headrests, a massive wood steering wheel, all necessary gauges, and an ignition switch. A rollover hoop was optional for the driver. Designed for the average Englishman in the early 50’s, it is a tight squeeze for many. An offset pedal box and lack of a roof are common grievances. Perhaps the most copied car of all time, there are a dozen companies that offer reproductions of the Shelby 427 Cobra. One reason is that the price of an authentic Shelby Cobra is unreachable by the average enthusiast. Every original Cobra has a unique 4-digit code.
Starting with the first production car “CSX 2000”, every authentic car is known as a CSX Cobra. Carroll Shelby and his team kept incredible records of each car, so validating a Shelby Cobra CSX number is as easy as a phone call. A real Shelby Cobra is worth a fortune in any condition, while replicas rise and fall with the market.
The beauty that simbloke has shown us (and it is beautiful, I looked at all of the photos of it)) has a B&M auto shifter, has some funky-ness to the fender flairs (especially the front ones), has an AC badge in front of the hood (real Shelby Cobra 427's has a badge that is a depiction of a cobra), and has lug nuts on the wheel rims (real Shelby Cobras 427's had center mount wheels). Because they where 'bespoke' cars, there are many individual touches that were done for various customers but none of these things are one of those that were done for individual customers.
And then there was Shelby's personal twin supercharged Super Snake: