Avanti tach sender location

[Hawklover]

I am curious to find out when Studebaker made the decision to move the tach sender from under the hood (ADJACENT TO THE WIPER MOTOR) to the "Z" bar under the dash?
This question comes about as I am looking at the July 1962 issue of CarLife as well as the October 1962 issue of Road & Track and the sender can be seen clearly under the hood.

[Gunslinger]

I’ve never seen the tach sender anywhere but attached to the Z-bar. If the photos are from July 1962 or October 1962 magazines they would have taken much earlier due to printing schedules. That means the car or cars photographed were either prototypes or very early production cars before everything was standardized on the production line.