“For 50 grand, I would buy a used corvette. way more bang for the buck.”
Back that up with some data!
We know the C7 tops out a ~190 mph and Ford has to govern the Mustang down to around `165 mph because it can't handle 190 mph. The 0-60 times suggest that the C7 corvette hits 0-60 mph ~3/10 of a second quicker than the Mach 1 although that's reported, not verified. 7 year old Corvette wins 0-60 regardless as well as top speed.
Quarter mile is where things get really sketchy.
C7 Corvette: 12.2 sec @ 117 mph
Mach 1: nobody is saying.
2019 Mustang Bullitt (rated at 460 HP): 12.6 sec @ 115 mph
So it looks like when comparing bone stock vehicles, the 7 year old Corvette beats the brand new Mustang Mach 1 in every aspect. Here is a 2014 C7 Corvette for $46,000. That's $7,000 less than the Mach 1 base price. That is clearly more bang for your buck. and with the 7 grand you just saved, you can buy a procharger for the corvette which will put you at around 623 rwhp and even then you still have $1,000 left for some long tube headers that will get you closer to 650 rwhp. That's like 760 hp at the crank compared to the Mach 1's 480 hp at the crank.
The 'Vette looks cooler too.
That Mach1 motor sounds awesome though and I'm sure as a couple years go by, we'll see what a few mods can do for it. But, as it stands now, if you want to go fast like Ricky Bobby, the C7 and even C6 Corvette is the most bang for your buck.