There is no manual/automatic motor, they are unbiased. Either will bolt up as long as it's a Bseries motor and Bseries tranny.
There is a crapload of stuff you have to do including:
- Change out the pedal assembly
- Install the clutch master cylinder
- Run clutch lines
- Get a different ECU (yes, there is a differnece between a manual and an automatic ECU)
- Change out shift linkage
- Change out the center console
there is likely more, but I can't think of it at the moment. It's not usually worth the trouble (despite what Honura says

h: )