Quote: Not only did the last 18-spline that I sold NOT have the boss, it also used the 307 front bearing. As I understand it, it was a 66 trans (but may have been a 67).
Correct Jim, the 66 transmissions did not have a boss, it was added sometime in the later part of 67 production but did not yet contain the VIN stamping (that didn't start until 1968).
