is this a real demon?

Neither am I, I just use a VIN decoder.
MyMopar - Mopar Forums & Information - Mopar VIN Decoder 1966 - 1974

Its a:
Dart/ Demon
Low Price class
engine: 225 slant 6, 1BBL
year: 1971
Assembled at Dodge Main, Hamtramck, MI, USA