Standard t-bird pattern requires redrill as mentioned above. 13" rotor kits put on our cars require at least a 17" wheel for clearance. You would also need to relocate the caliper farther out to accommodate the larger rotor. 99-04 Cobra calipers are typically the choice when doing 13" rotors.
I do not know if you can use a different mounting bracket and retain the stock calipers tho. Can anyone verify that?
1997 Cougar XR7 30th Anniversary Edition
Stock 4.6, Tokico Blues, lowered 1.25", 2.5" high flow catback exhaust
2013 Escape (daily driver)