The explorer 5.0s were great motors but all seemed to be a little different. Some of the things that were different...
went from 19 to 17lb injectors after 98 I think
Went from return fuel rail to returnless at some point
Went from GT40 to GT40P heads in 97
EGR setup was different (2 versions)
None had distributors but have setup to run them if not using coil packs.
If you want to run the mustang harness you need to add a couple sensors, not too big of a deal. Dizzy is a tight fit. I run 1 in mine, have another ready to drop in. Building a motor now that I will run the exp efi and serp on. Motors are great for the Bronco, real happy with mine.