He said no turbo or supercharger and GM bottom end. Could be a stroked LS1, LS6, LS2, or LS7 GM block and nitrous. I don't know what he has, but it seems whatever it is he's running seems to be pretty stout to call out Lightspeed.
I think the main concern being an 800hp Supra declining a roll race from 40-160 when that's considered their playground.