Many years ago, my Dad & I rebuilt a 4x4 C4 on the kitchen table in the house LOL.

It was pretty easy since we had a how-to video to follow. Main thing is to take your time and make sure you're working in a clean environment. There were a few specialty tools we had to borrow (some type of puller, I don't remember what exactly) but I think you can borrow most tools from Auto Zone or Advance.

Here's a similar video for your E40D: Rebuild DVD, Book/Manual - Ford Truck E4OD Trans

These days you might be able to find this info on the internet (youtube maybe?).

Good luck!