Wire harness, injector harness, ECM, fuel filter relocated, powersteering reservior (junkyard item), battery cable, longer throttle cable (junkyard), non-turbo regal heater core, AC lines, electric fan, radiator with oil cooler, that's all I can think of off the top of my head. It's a very easy swap.
I watched my dad do the conversion. From what I remember, the fuel filter had to be moved to the 87 location in the back of the car but we never actually tried it in the hotair location. From what I remember it would've interfered with something. You will need the short 87 feed line that goes from the main line near the crossmember to the fuel rail. I'm sure there's more that I forgot but the swap was very easy.