A904 slant 6 1968 and after transmission

jshank1991 said
Looking for a slant 6 904 or 727 transmission for my 72 dart swinger. Engine is a 67 slant 6

Stay with a 904. A 727 will require some mods, if you find one. Is your engine a 1967 or a 1968? It makes a big difference. One place you said 67, other place you said 68.