ed flex, i didn't notice but this is your first post. welcome to the forum. there's a whole lot of information available in here, i've found it to be very helpful for me and a few of my friends.
From what I've found out, no, you can't put the 09-10 rear wheel on an 07. I wanted to put a set of the HD Agitators on mine. The front would have been alright with the right axle, spacers, and bearings but the rear is to wide for the swing arm. It can be done if you also switch out the swing arm for a newer, wider one I believe but probably not worth the expense....YMO