All of the Warner transmissions used in Ford, Chev, or Mopar used basically the same governor. However on some, the driven gear was a little longer than others.
thats what i origionally thought, but after finding and buying an early non syncro 4 bolt governor.. i found it to not be the correct size. i learned that around 64-65 the governor faced down (fitting issues with the tunnel)was still a cast looking piece with a metal top and smaller threaded portion. now that seems to be what i am looking for