Hi Bob,
It sounds like you are trying to make a 1941-42 throttle rod fit on a 1943-46 pedal. The "ball" type throttle linkage should fit into a corresponding molded rubber "socket" on the early style pedal. Later versions use a linkage that has a 90 degree bend that goes through the pedal portions (2) and is secured by a cotter pin. I think I can find an image of an early pedal if you are interested.
Paul
