1968 Engine Identification

[Mosesatm]

This is for the green car.
The former owner installed the rear end so I don’t know it’s original application. The car came with 3.00 open gears. The 3.23 gears are crying out for a 5-speed in place of the toploader, especially if I road trip the car.
C153800

 

[Ruppstang]

Rob is most likely correct that it is a nine inch. It must be from a different year or model because it looks nothing like a 68 nine inch.