Trans mate-up

Hi fellow /6 owners! I finally need to rebuild or replace the slant in my '64 Dart GT. I have a couple of newer (70 $ 71) slants lying around. I would like to know if the crank hub size (1.92" [stock 64]) will mate up to the trans. I assume, a 904 automatic. When in doubt, ask the experts - you guys. Thanks !