Hi Brad
Do you know where this Duster come from?
It seems to be an export car. There is an "I" on the fender tag for International.
My Demon, made in Hamtramck, and exported to Belgium in 1971, also has this "I" on the fender tag.
U = United States
C = Canada
I = International (rest of the world)
Your sequence number (E33656) begins with an "E", like mine. I think (but it's only a supposition) that sequence numbers beginning with an "E" are european export models.
View attachment 1716240527
François