I added the 08+ Superduty mirrirs to my 04 Excursion, the wiring was a bit of a PIA but the rest of it was pretty easy. I added the electric teloscopic, fold, heated, with blinkers and running lights. I have not yet wired the power fold, and telescopic options, and opted not to wire up the running lamps. I bought my mirrors seperately shipped for about $250 each.
They bolt right up, however my left mirro had a nub that hat to be ground off, the right one did not need it.
Anyone have any good ideas for a clean install of a switch on an Excursion for the fold and telescopic mirror options from the newer SuperDuty's? I have not wired this up yet but may do so this summere.
Your left and right controls will be reversed but it seems easy enough to live with it.
Wiring for Driver side:
08+ Mirror____________________2004 Excursion
Wiring for Passenger side:
08+ Mirror___________________2004 Excursion