Overheard at a car show

I was selling my old 1970 original 340 Duster roller at the Ohlone show last year and two guys come up and start looking over the car.
I let them know when I see them looking at the vin# that it's an original 340 car (it was also posted on the "for sale" sign), then the one guy says to the other guy right in front of me that it's not an original 340 Duster, like I'm trying to scam someone or something.
I then informed him YES it is an original 340 car This is the THIRD original 340 Duster I've owned, and that I've got one of the other ones sitting in my garage right now.
Still not believing me they then look at it again and realize THEY read it wrong.
Then the guy that was basically saying I was lying started telling me about another Mopar show they were doing at Infinion Raceway and he was one of they main guys from the car club that was putting it on. I thought to myself "your a freakin Knucklehead". Mopar guys are usually very cool, layed back guys, maybe he was a Chevy convert or something?