Join Date: Nov 2002
Location: SouthEastern PA
I don't think you will be able to get deep wheels to work, even with skinny tires. Our offset is +39 or +42 (so the mounting flange is 42mm (1.65") outside of the centerline of the wheel).
If you go with an 8" wide wheel, with a dish of maybe 2.5" to the face of the center cap, and another 1" for flange thickness, that's 3.5" in from the outside edge. That puts the offset at only 0.5" (~13mm) outside of the centerline. So the wheels will stick out an extra 1.15" (29mm) from the stock Thunderbird wheels.
Now, if you are using 275mm wide tires, you will probably want 9" or even 10" wide rims. So that gives you another .5" to 1" that the wheels will stick out over stock. So your wheels would stick out 2" more than they do now. I don't think there's any way that will fit, even with rolling the fenders.
Your best bet is to find a wheel pattern you like in a high positive offset. I don't think any dish type wheel will work.
Owner, 1990 Thunderbird SC, white w/ gray cloth