In my case, and in 98% of the cases Jim has done (his report), the throttle cables will be fine...only the brake lines have to be changed to 2+" over stock.
As Don said, this is NOT a 3 hour job if you've never done it before. Get the bars out on a workbench after removing them, get yourself a pen and paper, and make yourself a little picture of the pin connections with the color of the wire going to each pin hole. It's in the wiring diagram too, but a pictoral is sometimes just easier, at least for me. Keep the beers to a minimum on this job, until you get the wiring part done. It is an excellent time to install the Heat Demons...the new tapered version of the Wild 1 575's do not require any modification to the switch...the main body of the switch fits where the old clamp did, and the "lip" part is offset a bit, so goes onto the fatter part of the bar with no problem. The small gap some of you saw on the clamp is normal for any application. Do NOT overtighten the two bolts on the heat demons...use a torque wrench. There will be a paper thin gap in all likelyhood.
If you have a HD or indy shop do this, expect a full 6 hour labor charge. It's not hard, but it does take some time and patience.