727 Transmission engine size?
And there were a few made for slant 6, so there is several. If you are looking at a used trans it might not even fit Mopar. They were made to fit IHJ, Jeep, I don't know what else offhand. So there's at least 5 or 6 different Torqueflite bell patterns.
You don't want either of these, IHC or AMC