A friend of mine has a 64 413 block that he is thinking about selling so i told him i'd post it here and see. He wants 350 obo for it. It is in decent shape but would need rebuilt and probably rebored. the block has been sitting in a garage for about 5 years(swapped out with a 440) and over time, he lost most of the parts for it, but he thinks he might have the rotating assymbly somewhere. pm here if interested.
*Update* We've found nearly every component to motor including rockers.heads, intake, pistons(shot), oil pan, etc