Another 727 question

Not much is interchangeable. Maybe some clutches and drums and such. THe case is totally different as is the valve body. I believe the input shaft has a different spline count too, not 100% sure on that. And of course, they are cable shifted. I have an early cable shifted 727 for a slant 6. I'm sure I'll never use it, but I have it and that kept it from gettin scrapped at least.