904 to 727 Swap

You will need a different driveshaft and yoke, as the 727 tail is longer and different splines.

It will bolt right up and sit in the car, same rear mount

Kickdown linkage MAY (probly is) different

(Mine is manual valve so I don't use kickdown)

If you have a console shifter, make sure the new trans has the mounting holes for the bottom shifter bracket, not all do