Rear end question

[Chip68chevelle]

Anyone know what this rear end is. This is my first build 68 chevelle
http://chevelleforum.org/attachment.php?attachmentid=4716&stc=1&d=1620870633

[chevymaher]

Upside down 12 bolt.

[Chip68chevelle]

Hahaha, not sure why it’s upside down. Wasn’t like that when I previewed the post. Thank you for the info

[Hank70SS]

A very rusty upside down 12 bolt.