Looking at the top down view in the 1989 T-Bird and the 1995 Stang I see the difference now you spoke of.
Are the pistons fully bottomed in the calipers? They ratchet up during emer brake use.
Advance Auto has the rotator kit in the Loan-a-tool program. Free to rent
https://shop.advanceautoparts.com/p/...20OR%209150047
You probably know all this already though.
Cycleguy, that looks promising.