Do you know anything about this 383 Duster?

So I buy a car from a young kid who advertised it on Craigslist that got the car in a trade and hardly knew how to start it, and it makes me bad guy for not knowing the history?
I told Ragnar all I knew about the car, and he decided to buy it. It sounds like he is reaching out to see if any of you Mopar gods have any additional knowledge. Google me and although I am not a Mopar expert, I think you
will find I know a little bit about automobiles. :)