This is a copy and paste from another forum that I am on. Oilburners.net From what I have seen they are a very knowlageable group over there. I suggest checking it out aswell as some other diesel forums.
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Its got a 2.3L turbo diesel now, 4cyl overhead cam made by mitsubishi. It was offered in both the dodge ram (rebadged mitsubishi mighty max) as well as the ford rangers in the mid 80s. Its called the 4D55-T, its descendant is still in production to this day and they are the workhorse of south east asia.
We bought a 1985 ranger donor truck from a wrecker that had the engine, I had to rebuild it, then swapped it over. All rangers of that era used a mitsubishi transmission of one type or another, so the bellhousing from the donor fit the transmission that was in our truck (the donor was 2wd so we couldn't use it).
Very nice little motor and it has comparable perfomance to the 2.9L EFI that it replaced. It uses the bosch VE rotary injector pump and it can make lots of power, but I'm too scared to crank the fuel up for fear of lifting the aluminum head. Stock rating is 86Hp, but the new rollercam head I put on last year probably brings it in the mid 90s. I'm sure it actually has less max power than the V6, but the powerband is such that you only notice the difference if you try and go past 80 MPH (which it will do, BTW)
Its actually my sister's truck, but I joke about saying that its MY engine. I saw a ford exploder with a cummins 4BT once, but the nice thing about this engine is that it matched the weight of the 2.9 so no suspension mods were needed.