8.8 swap
actually the mustang gt's came with pretty tall highway gears, i believe somewhere in the range of 2.60:1 or something, but don't quote me. definitely in the 2's. i had a 97 gt and had aftermarket richmond 3:73s in it because the stock ones are pretty undesirable especially in a mustang not known for being a torque monster haha. another reason to go with the explorer unit