That isn't the original Revson Pantera spoiler. His hung down low in the front and had brake ducts.
I don't have a picture handy but I can tell you that it shows on one of the early magazine road tests that they had Revson driving in.
I want to say that it's Road and Track and it's a '71Pantera.
It had the reputation of being too low to use on a street car. It really hangs down in the weeds.