kz6fittycent I will agree with you on many points, the more I get into the motor the more possibilities I see. As we have both mentioned, rotaries are easy but expensive, these motors as far as the 2,.2L or 2.0 have been used around the world with various variations.
I for one recently discovered the Magnum, from Thailand, which several people on this forum know about but little is known of the motor. I actually found a Magnum valve cover, which I am placing on my current 2.2L. I have some friends who are big time into the 323's of the era and I guess I'll begin to poke around there as well, as those were made turbo, but use a different engine.
I know Mazda made a truck/van called the Bongo in the same era, these were diesel, but I don't know much about them or if they were turbo or not, doubtful. I have also read that the 2.2L existed as a diesel as well during the same time frame as 4th gens. I wonder if the intake manifolds of the diesel would be better suited for a turbo application.
The fun of this is getting into the weeds. Manufacturers are lazy and would try and use the same parts for as many different vehicles as possible. Only brand gear heads would know if head x would fit block Y and so forth, but that is part of the fun.
I would love to build a turbo diesel version of this truck or even a gas turbo for the novelty. No high horse power, as these trucks do not need it, but it would make them fun to drive.
And then I found this .. lol
https://www.mx6.com/threads/b2200-f2t-swap-put-a-turbo-in-your-truck.127191/