Correct style master cylinder for a '67 383 Formula S

[GRANCUDA]

Which of these 3 master cylinders would be correct for a '67 Barracuda Formula S 383 w/manual disc brakes?

 

[nm9stheham]

The center and left ones are for drum/drum brakes, but I can't say of the one on the right is the exact one used in that year for the Kelsey-Hayes disc brakes.