Finished putting an 8.8 w/ 2.73's out of an 89 GT in my LX....
It drives like a dream...
Only thing is that the spedometer now reads low. I was doing 70 mph but my spedo was only marking 55...
I looked for a new spedo gear but they don't make any for 91-93... any suggestions?

None of the vendors have one? Can you get the one from the 89?

From what i've seen, I don't think they are the same. I looked through my Mustangs Unlimited catalog and thry have gears all the way till 90... 91-93 have an asterik and are listed as "not available".

http://www.mindspring.com/~steveflyer/speedo_gear_select.htm