The M5OD will bolt up to your engine. I think the over all length is similar but can't find the numbers to re-enforce that point. If they are the same then it's a pretty straight forward swap.
If not then you have to relocate your trans-cross member and length/shorten your drive shafts accordingly.
You'll need to swap the ***** cylinder as well. the throw-out bearing is prone to failer so before it goes in it's a good time to replace it. You'll want to use the clutch assembly as it bigger, it will all bolt up.
Also you'll want to M5OD out of the 4.0L Explorers and Rangers. They are beefer then the ones mounted behind the 2.9L.
Nothing to serious just little things that can slow you down, but worth it in the long run.
