Engine swap:

[PKRWUD]

Go here for all your questions. They have a downloadable manual for $25 that covers everything you'll need to know.

from their website...
If you're here, you've undoubtedly decided that you have some interest in building a V8 Ranger or Bronco II.* Even if you're just thinking about taking on the project, this manual will help you decide if the project is within your abilities.* It includes information such as wire-to-wire electrical connections, complete part numbers and sources, and over 100 photographs, diagrams, and charts mapping out every stage of a V8 Ranger/Bronco II swap.* If you have a 1983-2000 Ranger or Bronco II, this manual will walk you through the swap, step-by-step, from selecting the proper tools and work space, to connecting your factory gauges, and everything in between.

Check out their website, and you'll see what I mean. Below is a picture of one of their 5.0 Rangers. Looks good enough to be factory to me!

Take care,
-Chris