The car itself seems decent enough, but that's an Exner design I just can't dig. I never could grasp why they put Valiant styling lines on a Dodge product. It's definitely a love/hate design; sadly I have to hang with the hate crowd despite loving what it represents. It's just too Exner.
The engine doesn't present well at all. The filthy raw aluminum detracts from the bay worse than new, clean raw aluminum. The "couldn't be bothered to find a molded" upper hose and toggle-switch electric fan are bothersome details: where else did they get lazy?
A "true Max Wedge 413 V8" would not have aluminum heads, six bolt valve covers, Edelbrock carbs, or $20 Mr. Gasket air cleaners. If I had a genuine MP-stamped 413 block, I think I'd want the engine to be right, and I'd damned well show the stamping to interested buyers. The only thing definitively Max Wedge on that engine is the exhaust manifolds, and those are likely reproductions.
Despite those complaints and obervations, the ask doesn't seem extreme if the chassis is good and the engine runs well. If a guy falls in the "love" camp on the styling, I couldn't fault him for considering it.
All that being said, I'm wary of an Uncle Johnson, and the sleaziest money-hungry con-artist woman I've ever known was named Charlene (because her family knew how to spell) so the whole "family" image they're pushing has a scammy feel to it. Seriously, your adult children both still lived at home when their mother died, so you had to start another business to get them to work? Everything about the seller seems... icky.