Right off hand, you will need a different tank. The EFI fuel pump is located in the tank. You should also include a fuel safety cutoff inertia switch. It's function is to keep you from getting fried in the case of an accident. If it is not there the pump will continue to pump gas and if the line is broken, you will most likely have a fire.
You will also need the computer as well as a bunch of sensors so it can run your engine efficiently. Infact you probably should get the entire wiring harness and scavenge as many parts as you can with the injection system from the donor car.
Good luck,

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