As a Shelby GT500 owner, I am very familiar with the risks of high powered rear wheel drive cars... especially since the Shelby has a live rear axle with a pan hard bar. It doesn't take much for the rear to jump out on you if you're not paying attention to road conditions etc when you get on it.
Obviously the Heritage Ford GT is an even bigger animal that you MUST respect.
Being "unfamiliar with driving stick", you shouldn't even THINK of getting behind the wheel of such a car! Learn properly first, understand the implications of what may happen in different situations. Don't expect it to be your full nanny controlled Lincoln MKZ. These are raw driver's cars. You must respect the power and understand what might happen in certain situations.
Even then, they can still jump out on you... but at least if you're aware of how and why, you might be able to recover it as well.
I've had my Shelby for 11 years now and I absolutely respect the power and very much understand the risks... yet even I had it jump out on me once 3 years ago. Thought I knew the road I was on real well, but the road had buckled in a new spot in the week since I was last there, didn't notice the new bump in the road. I gunned it in the same spot i had many times prior as I was changing lanes just as I had done so every time... then the rear wheels hit that bump, the rear end completely kicked out tti the right! There I am, just after entering the freeway, looking down the road directly out of my passenger side window, steering that direction but waiting for the car to hook back up before it reached the center ditch!
Steering into it, feathering the throttle trying to urge the car to hook back up, it suddenly gripped and swung back 180 degrees facing the other way, my rear tires kicking up the edge of the gravel of the center shoulder! Now i'm steering hard left looking out the driver's side window, feathering the throttle to hook up again... this time I was able to anticipate it gaining the grip and was able to sway it back into control. No harm, no foul!
Afterwards, I had a huge smile on my face, because it was FUN AS HELL to suddenly be unexpectedly white knuckling it, I love white knuckle edge of control winter driving (when a blizzard hits here, I tend to go out driving for hours, as I live the adrenaline of white knuckle driving), so this just got me into that mode instantly.
I literally said 'Wow! That was FUN! Let's not di that again!" With a huge grin on my face!
So, yeah. Very familiar with stick, very familiar with the risks, absolutely respect the power, and if I get into a situation despite all of that, I do know how to react to overcome such loss of control.
This guy on the other hand... goes down into "Florida man" lore as so many before him. Go figure.