Brand new unnused? Not likely. But posssible. People purchase stuff and never get to use it. At the cost of the DANM block, I'd be using it right quick for sure!
Not brand new as in I just bought it from Chrysler, but new as in no one ever used the block. It was still at the 3.900 bores that they came new with. Yes it probably sat around for 35 years.
I was all over it when I saw the listing.