WIW '70's Dodge Truck with 440

I know very little of this truck, but the owner wants to know what it might be worth (she's not a Mo-person).

Mid-70's Dodge, might be re-clipped onto a later cab. 440, with headers, speed parts, cam, etc. Supposed to be pretty quick. Those are fattie drag tires under there. Interior is fair. 727 auto is definitely kitted.

Thoughts? Opinions? I know nothing of the truck stuff, really, so I'm throwing it out there. I have NO idea if the motor is original to the truck or not.

Thank you!