I believe the early style was called the Delco Freedom and the later 1970's was the Delco Freedom II. They both had the white case and blue top. Same cases, just a slight alteration in the stickers they placed on top.
This guy cloned his own modern batteries into replicas of the originals for the later 1970's Trans Ams
http://www.78ta.com/HTAF/index.php?topic=42751.0
