You need to look for one out of an 87-88 turbo coupe, they had the 8.8" posi, the earlier tc had the 7.5"posi and the other models had the non-posi 7.5" should be the same with the cougars, the XR7 should have the 8.8"
'83-'88 V8 & V6 T-bird's came with 7.5's. Some of the V6's had 3.27 gears. V8 cars usually had 2.73's. The '87-'88 Turbo Coupes had 8.8's with rear disc brakes & either 3.55 or 3.73 gears w/Traction Lock. Earlier TC's had 7.5's with 3.45 gears w/Traction Lock.
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