'63 m/c to '72 m/c actuator rod question.

Converting from '63 single / fruit jar master cylinder to '71-'73 dual master cylinder.
( Scarebird disc conversion)
Question is.... What actuator rod should l use ?

One from the '63 m/c. ?
One from a '71 m/c ?
Or make one?
I am a race team welder / fabricator and was thinking of just making one up with a Hemi joint like on the race cars.

Your thoughts ?
( and believe me. They are greatly appreciated and considered).
Racing's crew chief's didn't get where they are without listening to others who came before them.

Hemi joint.........lol! Not thinking.
HEIM. (spherical rod end) joint.