If you're not going turbo in the fiesta, dont bother with the box as you'll need custom shafts. Remove the box and cables etc and sell them though!
You'l want the ecu, loom, pats doodah from round the ignition barrel and the chip out of the key and all the bits you've listed!
I *think* you'll need a different inlet manifold too as the mondy one is massive. I'm sticking a blacktop in a puma and its the same engine bay pretty much and using a focus inlet