Centering the rear wheels

Hey Rowinafour, how far did your setup move the axle back? I won't need to lengthen the driveshaft because it is already too long for the 8 1/4 rearend anyway. And I live near a hardware store, so longer bolts won't be a problem.
The reason I'm looking into this is because I'd like to have a bit of a larger tire, but mainly to avoid having the driveshaft shortened. Looks like I'll be doing that anyway, though. and I was hoping to have everything driveable by this weekend, or next weekend. I may just keep the 7 1/4 under there for a bit longer. The Dart isn't quite road worthy yet.