If that 440 block ends up being unusable, I have a 440 bare block with a '75 casting date, with main caps I'd sell you very reasonably...of course, shipping on something like that might likely be crazy expensive! It came out of a '74 New Yorker about 15 years ago. I also have several stock 440 rods with caps, and other miscellaneous 440 parts I'd sell you for the cause for a very good (and cheap!) price.
I remember building my '67 Belvedere I Leichenwagen while I was stationed in Germany, and getting it ready to ship back to the US. Getting parts over to Germany was not real expensive then; but of course, I was able to use the US APO postal system and not having to ship to a German civilian address. This was a car I'd bought in Belgium in 1990 from the second owner. It was one of just three '67 Belvedere I six-passenger wagons shipped new to a hearse converter in Antwerp. Two were sold to a mortuary in Brussels, and one went to Sweden. I believe my car is the only one to survive, and is currently in Oklahoma.