Thanks K.C.
amstrd - The OEM FJ wheels come in either 16" which is a 5 spoke or a 17" which is a 6 spoke. Which ones are you exactly looking for? The 16" 5 spoke come with the off-road package setup with the FJ.
Yes it will. From what I've read, it will give you a much nicer ride firming it up as well of an overall lift of roughly .75 inches. Here's a good thread talking about the conversion and compatibility.
It looks like TC4Rnr is running the same setup I'm selling. PM him to see if he's happy...