Interesting, but a very annoying AI generated narrative, and maybe three actual pictures of a Boss 302 engine.  An article loses credibility quickly when the narrative and the pictures going along with it are of a totally different item.  This tells me the person(s) who put it together do not know what they are talking about.  And relating modern Coyote to a Boss 302 design?  I do not see any similarities.
I found this very annoying to watch.
Boss 302 was my favorite Mustang.  I think most of this was pure BS.

My wife's nephew has a Boss 302 engine that his late father had built and modified that has never been installed. The last time it was run was probably 20 years ago on a dyno. He has all the paperwork on it and it put out over 400 hp. It has sat on a stand in his basement since then. He had always intended to find a good Boss 302 needing an engine, but he died before he could do it.
I have told him that he needs to sell it, but at what price? He's just sitting on it so far. I will see him this weekend and ask him again what he plans to do with it.

The value can vary greatly depending on if it's a service block or not.  The 69 parts bring more money than the 70's parts.  If it has all the small stuff like the carb and so on then the price really goes up.

RTM wrote:

The value can vary greatly depending on if it's a service block or not. The 69 parts bring more money than the 70's parts. If it has all the small stuff like the carb and so on then the price really goes up.

Most any block can be made serviceable; its just a question of what you have to do to get it there.  If there isn't enough bore left you can sleeve the cylinders.  If its cracked it can be repaired through welding or pinning.  With a block that rare, and potentially valuable, guys are willing to do all kinds of stuff they'd never even consider for a typical small block. 

Definitely though the money is in the accessories.  A lot of that stuff got tossed when the car came home, so its rare and guys need it for a correct restoration.