D.isposable S.peed M.achine
if you have the time and the money and you like the car get it
just make sure you really want it becuase by the time its done you'll be so upside down in it you'll never get your money out of it if you sell it
thats the driven gear
for a 3.55 you can buy it from the autoparts store (speed sensor assembly)
the 3.73 gear should be availiable through a ford racing dealer