Hi. I apologize in advance if this has been posted before. there is no search bar and way too many pages to go through. not really enough time

I live in Canada, and i am looking to drive a 1999-2004,2005 Nissan Pathfinder with a diesel engine. To swap diesel Nissan engine into a gas Nissan body. It might have been easier to import one (nissan terrano) from Japan, but first it would be interesting to swap an engine as a learning experience, and second Canadian Laws require for a car to be 15+ years old to import. and i think now it is very tough to import or you cannot import right hand drive cars at all. anyway the question is:

Has anyone done it yet?
what are pros and cons of this conversion?
what will it need? ( reconstruction of engine bay, harnesses, fuel tanks, fuel lines, fuel management systems and so on)
what are approximate costs of this conversion?
will transmission from gas engine fit diesel engine? (auto and/or manual)

thank you for your replies