3 pedal autoshift swap

[Skman]

I do have the clutch pedal with this model. It's a 2013 so maybe the last on the line before going to the UltraShift without clutch? I've heard that even tho the body is the same between the Autoshift and a manual tranny that there are some things that make it more difficult to change it over. But then I read where guys were doing it pretty easy. So I figured I'd ask on here if anyone had made the switch.
I have a new heavy duty clutch so I may just see about swapping in a reman 18 and putting a shift tower in place. This tranny is original anyway with 800,000km. Lots of parts have been changed on the tranny (sensors, wiring, XY shifter) but still original inside.