1977 440 out of a van.

It the motor home engines that have the different water pumps and heads, you maybe luck with one from a van.
Check the tech pages at big block dart, lots of good info there too.

http://www.bigblockdart.com/techpages/techindex.shtml

Also check out Jim Lusk videos how to make a big block k member.
[ame="https://www.youtube.com/watch?v=mnaM_jHLi08"]DC K-member 04 part one a.mp4 - YouTube[/ame]