Every dimension I mic'ed was the same. Lip groove is in the same place. The original seals looked the same.

Transmission build date is Jan 11, 1971. Not sure if this could have been a possible mid year change. And again I cannot 100% confirm those parts are original to the transmission, just that was in it when I took it apart. I don't want to burn this thing up again, it's getting too close to race season now.