It looks fairly solid, as far as E bodies go. Personally, it's a non numbers matching 318 car that needs the body done. Nota lot of work, but if you cant do it all yourself, you're looking at $10K worth of parts and body/paint, nevermind the "details", like rechroming and such. It's not a bad car, but the end reslt is not going to be worth the price to pay someone to do it. I think that's why you may not be generating the interest. If it was a 340 car, or a 70-71, you know you would have sold it for more by now. It's a fair price, just not a "deal" IMO.
This is where I'm coming from as well. I think the black painted engine bay may also be working against you.
You may find a buyer at that price but a savy Mopar person will likely see that it will take more money to correct some of it's issues than it would be worth when done (in todays market).