1966 C code convertible - 6T08C135871
Casting date on the steering box is 5H7. The buck tag has K25 on it. The warranty plate on the door has 26K. The build sheet has sched date 26K.
I think it is original to the car. When I stripped it down, I found very little (unfortunately) that the previous owner fixed!! There was no indication that any of the steering or suspension had been repaired/replaced.
I had the shaft removed when I took the picture as I am completely rebuilding the box.
Fred