Make sure you get all the engine wiring harnesses and computer
from the new engine, and make sure the new engine comes with all the
accessory brackets (preferably with accessories too). The engine block
was changed in 1995, and the old accessory brackets from your truck
will not transfer over. Having the new brackets and accessories will
greatly simplify that part of the project. The wiring from the new
engine will be completely different, so you need to have access to a
wiring diagram for a 97-98 Ranger and a 90 Ranger. That way you can
find out where to connect the power wires and instrument cluster wires
to the new engine harness.
You might wish to check out the 2.3L forum at the following website,
there are some good Ranger experts over there that have a lot of
knowledge about things like this:
http://www.therangerstation.com/forums/index.php?showforum=3
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