Those DA values are pretty crazy, I guess that explains a lot of why his HP is so much higher. I tried a few other online calculators using that weight and trap speed and it still comes out to over 600 HP at the tires. Wild.
I watched a video last night of a guy driving around a '70 Duster with a basically stock 6.4 and 6-speed swapped in, he has to run drag radials on the street just so it won't spin the tires through the first 3 gears.
I also know a guy locally with a '72 Cuda who swapped a stock Hellcat engine back out for a healthy stroker SBM because it spun the tires so bad, he almost wrecked it on the freeway when he hit the gas and it did a 180, at 70 mph...