I think we're comparing apples and rutabaga's. The throttle body size is different on the Touring models (08 and up) versus the Softail and Dyna models. Unless I missed a recent change, the non-Touring bikes still have the 46mm TB, and the Touring bikes have the 50mm TB with electronic throttle control. Of course, I could be full of hooey, it's been one of those kind of weeks so far.
Jerry
BTW, back to the original question in this thread, I think before I spent a bunch of money on pistons, cams and throttle bodies, I'd want to make sure the leak problem is really fixed. That might require some decent cylinders, not the junk that H-D put out back in '07. If you're going to spend all that cash on upgrades, don't forget the cylinders. Axtell makes a great product. Contact sadunbar on this site for some info on his build.