I have just done this a couple of months back.

Heres the link to my rebuild thread.

https://passionford.com/forum/restorations-rebuilds-and-projects/247855-my-converted-2wd-escort-cosworth.html

It was actually easier than expected to do in all honesty, the only challenging bit to do was the removal and replacing of the sump.

Also, try to find a 3 door steal gearbox cradle, as you won't need to fabricate any brackets up to secure the gearbox.