Biggest problem with that is those guys wouldn't be moving over to let him through, and that big ark would not draft all that well. Not bad otherwise. But the answer is not really.

Why are we comparing yesterday's cars to todays to cars?
Compare today's cars to yesterday's racing, and forget about that stage nonsense and 55mph pit lane speeds.
The big advantage IMO that would help park today's cars is if the Superbird got to run with modern tires.
And that video has the Superbird rake all wrong.

Why are we watching a video game? Vs two real world cars head to head on a real track?

The pit stop comparison is nuts. Current cars have a single nut on each wheel, a fueling system designed for dumping gas much faster, and trained pit crews. Give the bird a comparable fuel system, and a modern crew with hands on track experience with the bird's antiquated tire changing process would be more realistic. Then we can start to talk about the tires and motors based on production cars of the times. I'm betting there are no Ford motor company motor parts on that Mustang.

The entire concept is misleading at best.

Your concerns have merit, and there is no way to resolve, because pit stops are not the real issue here, and a simple way to continue the comparison is, mandate every pit stop should be for both cars "x" amount of seconds, and let them race.

Modern simulators are pretty accurate and thats what this was, but if you can arrange both to do this for real by all means go for it

With a 20+ mph top speed differential, no contest.

Unassisted, Bird is lapping at better than 45sec/lap, the other car at 49-50ish. 10 laps in and the slow car is a lap down with no draft. 30 laps in and the slow car is 3 laps down. The birds went better than 35 laps in race trim, so maybe 5-6 stops and putting the new car down almost 4 laps. Current cup cars would make at least 5 stops as they usually go about 48 laps (in the draft). No Draft, they aren't making it 48 laps is my guess. Unless the Bird had to make twice as many or more stops at the slow PR speed and old crew times than the current period car. Give up maybe 1.5 laps on a stop, put them down 3-4 laps on a run, net +1.5-2.5 for the Bird. Maybe the new car wins, but still unlikely.

A kid I knew made the comment that Richard Petty driving a stock pinto would beat me at Daytona if I was driving a 930 Porsche. I laughed at that one. You could cruise if you wanted or hammer down and bury it. Either way that pinto isn't keeping up unless the Porsche breaks. He also didn't know I had been on the high banks there before. Going 150 there is a sunday drive in a nice car.

Does the bird get a plate, or does the new car lose it? I remember 20 years ago or so Rusty Wallace went 242 at talladega with no plate.

No plate, its a question if its top speed (and modern rubber) would be enough to hold them off, even with 25 sec pit stops compared to 10 sec pit stops for the modern cars - it spanked them in the video