$425. installed including FMS gears, fluids, & labor... also, the correct speedo gear. Kinda high compared to what most people have paid, but I live in la la land!( Naples, Fl )
I got a Turbocoupe 8.8 rear end with 3.73 gears stock for $60........ sold my 2.73 8.8 rear end for $40 to a friend, so my gears cost me $20 plus my labor to install the whole rear end.
Many of our local club guys (Ford mechanics and the like) do installs on the side for like $125-150 plus the parts & supplies.
Enjoy them, quite a bit of change, especially for me after driving with 2.73s for 15 years!