I don't think any of that will fit. If you want big brakes, get 93-97 T-Bird spindles and 94-04 Mustang GT calipers or 94-04 Cobra brakes (calipers and rotors).
Your 89 already came with a 1.20 inch sway bar, which should be plenty big. If you really want one bigger than that, try the 1-1/4 Addco bar. If you want a bigger rear bar, try the 1-1/8 Addco bar.