Ok so in all my poking around, I finally found a source to help make heads or tails of the GM 56 series connectors and terminals, especially the terminals.
Here's the place I found. They have good prices and lower quantities. More importantly to me are the pictures.
http://www.pcsconnectors.com/packard56.aspx?page=3
The Delphi website is good as well except when it comes to the terminals. Their descriptions are terrible IMO. You'll find multiple part numbers with the same description and picture. I have no idea why and if the info is there, it isn't easy to find. Even looking through the technical drawings of the terminals couldn't tell me what I needed. I found the above website better for listing the terminals. As Carl mentioned though, the Delphi site is very resourceful.
http://delphi.com/manufacturers/auto...ction-systems/
Hopefully, this helps other people.