V8 K-member needed

I'm 99% sure yes, but my point about a '73 Duster factory big block car, not! I tried to tell the guy, mopar never made a big block Duster, he disagreed, whatever I pretty much said. And I passed on it. Should I have bought it, maybe, but I'll use what I have before spending any cash on a *rare* item as what he has. Simple case of me being sarcasstic towards someone who knew way to much, if you get my drift, ha-ha.......
Mark