Similar is the correct word.
If you could email me a picture of your internals, I can better guide you in your search.
Sometimes motors have been tampered with and internal components might have been changed so
I need to see what you have going right now.
My email is gdaddio@videotron.ca
In the meantime, a 71 and up gear may work if you find an early 71 model. Later models
had metal plates installed.
Jules