I hope you are good with wiring because think about how much wiring you will have to do to make everything work.

That being said

firewall (obviously)
steering rack (I have an extra one if he doesnt have one)
dash support bar
dash
center console
clutch master
brake master
clutch line
brake lines
blower box if you plan on running AC
steering column (might be able to use a LHD one though, I don't see why you couldn't)
engine bay wiring harness