On the factory 15x7 rally wheel, you can fit 245-60R-15 tires on all 4 corners. On the rear they fit fine. On the front you need to ever so slightly bend the edge of the front fender extension with pliers to make them clear when turning the wheel. Sounds bad but it is easy to do/reverse later if desired. No paint damage from my experience and the change is not noticeable.
I also have a staggered setup with Cragar SS rims. Really like the way those came out.
You can see a few more pix in my Garage Section of this web site.
-Mark.