What transmissions will work with this?

Have had a 904 behind a 341 hemi in my 67 Dart for five years now-no problems.Just drilled the valve body plate and changed the governor to 340 specs.Lighter than a 727 shifts good.I have a bunch of 727's so it is not that I don't have a 727 to put in.It's just that the 904 is a good transmission