I saw a black 3.2 Mondial coupe at Sears Point on Saturday with 360 wheels on it. I didn't pay close enough attention to widths, but I would have to agree with GCalo about the 10.5" rims being too wide for the rear. I think they would rub the coil spring at the top.
Dominic Mauro in Florida just did it. He bought two complete 360 sets and he's now selling the four (4) 10.5" OEM rears!