I did some test fitting with an extra set of late model 911 rims i had sitting around in the garage on my last car before the sawzall took care of it....
These have a 52mm offset.
For the rear, the tire hit the trailing arm and the
inside of the fenderwell/trunk wall.
If the trailing arm was notched (about .5") and the fender
well/trunk area was moved towards the car centerline,
I think these would fit just fine. This approach would
be similar to how the hotrod guys "tub" a car to put
big fat tire on it without flares.
Mueller