I'm trying to figure out what parts you actually are working with here...
'67 Barracudas didn't have 5x4.5 bolt pattern, so you either are mistaken as to what bolt pattern they are or they aren't '67 Barracuda drums.
Now for the discussion's sake, I'll assume you're switching from 9" drum brakes to 10" drum brakes.
That should use the same lower ball joint as a '67 Barracuda, provided they are the original Barracuda drums.
If you actually do have 5x4.5 drums, they're either '73 and up A body units or maybe B body units of an unknown year.