Scoop and spoiler info
Hood scoop, yes. But not the dual scoops, in '72 it was the "snorkel" style scoop. And yes, it was functional, sort of. There were two 4 1/8" holes in the hood for it, but nothing was tied into the air cleaner. So cold air induction into the engine compartment, not specifically the air cleaner.
The go-wing was the only factory spoiler, and I don't think it was an option for the Demon or Duster in '72, pretty sure that '71 was the last year it was offered as a factory option. Now, could a very early '72 Demon gotten one? Probably. And could they have been added at the dealer? Yup. So, I don't think it was technically a factory option for '72, but that doesn't mean they couldn't have come from the dealer with one.
Here's a picture of a '72 hood with the scoop from the bottom...
from the outside- you can see this car has a go-wing added as well...