For anybody interested this guy JR has a youtube channel where he walks you through how to do a LS swap into a squarebody. From pulling the donor engine at a junkyard and how to rig up the fuel system...
He has all kinds of info.
Here's a link to one of his playlists for a LS swap.
https://www.youtube.com/watch?v=dhVZ...WvfqpMN8YkO9ZY
Scotty Baccus has a great guide on what to do and look out for when doing a LS swap his article is at:
https://tejassteelworks.com/wp-conte...uide-73_87.pdf