You could find a earlier model Ranger, with the turbodiesel that would be easier to install..........I don't know how many there are out there, but a lot of states have used them for DOT vehicles until they were dropped. I believe this to be a Mazda unit that was pretty reliable. You can also check with Advance Adapters on what would fit. The VM Italian
built Turbodiesel installed in a few Jeep Cherokees in 86-87 for the US and have been available in export markets since then is a possible fit too.
I have had good luck with my 4.0 but would n't mind one, just too much hassle to do it for me. If the Jeep VM will fit up to the transmission, I think they have been available in Canada since 87 in Jeeps, could be wrong.