Ive had My wheels on a few coupes over the years and cant believe how much difference there is in the set ups and tolerances although they were bought for the Landau. They were originally off a 76 anniversary corvette and were redrilled to ford pattern. they are 15 X 8.5 front and 15 x 10 rear and I'm not sure of offset.
On an XB I used to own with 295x60x15 rear and 245x60x15 front
On my second Landau with 275x60x15 rear (295's rubbed on cornering) and 235x50x15 front 245'sx60's rubbed on firewall.
And finally the wheels back on the car they were bought for you can see on the side wall where the tyre (still the 275x60x15) had been hitting on the guard on the brown Landau and yet there is plenty of space under the guards on this one