Some people just shouldn't own a mopar
After looking at the Demon closer I would retract my statement in my original post. That does not look to be a 71 and not an original 340 car.
What are the things that make this car looked to be a clone besides the 68 dash cluster. There are several, But 2 of these giveaways that I see that tell the story.
72 car . probably AC car. No rear markers, 72 pass inner fender drilled for AC, firewall smoothed to remove AC, 72 Harness under the hood, 72 Duster interior. 68 Dash bezel. Probably the most revealing is the drip rails. The drip rail chrome eliminator pieces are still in place. So it never had drip rail chrome. Meaning it was never a premium 340 car. I say it started life as a AC slant 6, 3 spd on the floor 72 Duster , That is why the Duster door panels are still in there with the 72 seats. It even has a 72 on up fuel neck for the newer gas cap to fit level. 71's the handles were all tilted.
So he could do all the doughnuts he want. Its worthless except for parts. Check his other burnout videos.