87-88 Turbo Coupe Thunderbird's. Automatics have 3.73's and Manuals have 3.55's. 8.8 inch rear.
do the turbo coup rear end swap, i done it by myself at age 18 just follow the some articles online pretty cheap, and easy.
93 cobra spindles, calipers, and rotor. it isnt that great of a mod, but its a hug upgrade to the crapy 86 stock brakes. i bought the parts from a guy parting out a 93 cobra a while back