70 71 shifter

[60K T/A]

While I have my interior removed I was thinking to replace the round slap shift handle  with a T handle. Can I swap the handles or does the shifter need replacing?

[burdar]

The shifter is different also.  The T handle uses a rectangular shaft.  The ball shifter uses a round shaft.  The black plastic "slide" inside the chrome shifter plate will have a round or a rectangular hole in it depending on what shifter it's for.