All the wiring is intact on the shell yes. Basically what is required is most of what you already said, Full Engine, Gearbox, Front brembos, bootlid, interior etc. Everything else is there and the shell has had all the welding plates for a safety devices roll cage too.
If you have anymore questions then please just ask.
Hi mate, im interested in the evo iv shell. Im new to evo's and currently have a classic impreza but now id like to own an evo. Can you tell me what it would take to get this up and running again please? Would i need to source an engine, gearbox and full interior, is the wiring etc all present on the car just now?