It has been a while since I messed with the speedo, but I remember the needles just press fit on. The speedo has a stop on it and the needle should barely rest on the 0 mark. The fuel guage is more tricky. You need to have the sender at 0 ohms (empty or full, cant remember which is which) then set the needle a little under E or over F. There is ohm info either here or on TC.