You will need these three things :
Car Selector

I'm not exactly sure the wiring harness is the correct one, you had best give them a call about your Sony model before ordering.

I had installed a Sony Sony CDXGT54UIW in my 2005 Roadster prior to the Alpine I currently have, but I sold it to maxcichon for his son's use in a Lincoln. he will still have the harness.
PM him and see if he will send it to you.

( you will still need the antenna adapter and the removal tools )

O, and do the door speaker capacitor mod ( maxcichon has those too )