Okay...
Here is the way I see it:
The LSx T56 is not even interchangeable with other GM engines, even the basic SBC, which is as generic as it gets.
You would have to look at the LTx T56, which was a more traditional GM engine, very closely related to the SBC.
Therefore, if the tranny is interchangeable with the basic SBC, then all you would need to do is whatever traditional method is available for swapping an SBC tranny to a SBF. There are ways, though I have never personally studied them.
SSeater:
I forgot about the LTx cars!
In my world, Chevy didn't exist before the LSx engine!
Edit:
FWIW, I know they make crank bushings with the Chevy ID and Ford OD measurements.
You would have to use a Ford flywheel and pressure plate.
The clutch disc would have to be the correct diameter to match the Ford flywheel/plate, but would have to have Chevy spline count, to match the tranny.