I used to own a Ranger with the diesel engine. It was my first vehicle. Always got 33.3MPG! The overhead cam engine mentioned was a 2.3L, the first engine was a push rod engine of 2.2L displacement and they also made a 2.3L Turbo charged version in the 2.3L. The 2.2L was built by Mazda, not sure on the 2.3L versions.
Some trucks had the XLT trim w/A/C and Pwr stering. Mine only had a heater and manual steering. They are reliable , but expensive to repair if you are not a mechanically inclined person.
If you buy one, it is far cheaper to repair the alt. and starter @ a competent shop. If your fuel system components fail, then a injection shop might help. In 1994 when I traded mine for a F250 Turbo Diesel parts were getting hard to find. I purchases the last shift fork for the Mitsubishi gearbox it had (So they said @ Ashville powertrain.) The trucks also had a 5 speed xmission, mine was a 4spd. Mail any questions to me u-like.