[OG68]

Agree that it's remanufactured, but there are a few things about the throttle plate.
68 throttle plates have the added vacuum tube for the thermostatic vacuum switch, and they also have three mounting screws.

The manufactured date is usually stamped on the left side of the throttle plate just forward of Scott's picture.

Did late 67 engines use the same vacuum set up as the 68s? I thought I read somewhere that they had something similar. If this was a 67 SR that would explain the throttle plate vacuum tube.

Or did someone (rebuilder) cobble up a throttle body to work on a 68 engine?