The ole gray mare is also an NA car. Small tires, full exhaust street car to boot. Bode is a 706 with a few stages, Izzy is a turbo deal the other two are nitrous small blocks/

Also FWIW I would highly doubt Gypsy Mike had a bottle in his car. Unless he swapped motors just to run the race, which I doubt as well. His NA deal is a Hot Street motor. I think if you opened a nitrous bottle near one they would blow up

I have known some of those guys for a long time and know what they are capable of running.