I can't comment on engineered stuff, we don't have any of those regulations. We just swap and drive.
Usually you'd sell the car and get what you want unless there's a significantly compelling reason to keep this one.
To swap you need:
The bare minimum you need to get it drivable: Transmission, flywheel, transmission linkage/shifter, clutch cable, pedal assembly, driveshaft, and rear differential (with matching trans final drive ratio of 4.11). And you need to do some minor wiring work to get the reverse lights to work.
Then to finish it off you need the center console, instrument cluster, and cruise control computer (if equipped and you want that to work). And maybe the master cylinder/hill holder components if you want them to operate normally.
Most people would install a new clutch so you're not doing the trans pull again later - that requires a clutch kit and to resurface the fly wheel.
It's a lot of parts and a lot of work. But it's not "hard", it's just a lot. The transmission assembly is big and bulky but otherwise straight forward, the pedal assemblies suck to remove.