Hi, I currently own a fiesta rs turbo that I'm building for hillclimbing. Unfortunately it has some rust issues that are quite structural, I have been given a mint diesel fiesta that I plan on reshelling mine into but not sure exactly what I need to keep from my shell.

Engine (obviously)
Gearbox
Shafts
Wiring loom
Fuel tank/lines

Is there anything else that I need to keep off the rs??