Relisted on Ebay for $10k with no reserve. If anyone's interested I can send those pics from ~15 years ago so you have a feel for where it came from.
I actually think $10k is a pretty decent deal for a running and driving car that looks as good as this one seems to look. And if you could find the original block (I assumed it was an original 396 or 427 based on my inspection) that would be icing on the cake.
Link to 1969 Biscayne