[Kurlon]

Yes, you'll need a fuel pump, a FI specific one actually, FI needs a pressurized fuel supply to work.

You can run pod filters, but expect a loss of midrange vs a proper airbox setup. Re-mapping can help a bit, but there is no replacement for a well tuned airbox for midrange. (Get a PC3 ASAP btw, the stock mapping will be way off with pod filters and your old SS's exhaust.)

You'll want the entire harness from the FI bike, dunno what other than lighting stubs can be removed. You'll also need the keys, antenna and instrument cluster as well, or the ECU won't allow the bike to fire up.

Realistically speaking, without swapping in an aftermarket EFI controller, you'd have an easier time converting back to carb operation.