Search the archives, lots of info there.
IMHO this is a bad move, in that the speedo part only goes to 85 MPH.
You need the complete dash wiring harness from the same kind of car you have. If you have a Turbo you need the Turbo harness.
You will need the digital gauge water temperature sending unit and the digital fuel gauge sending unit.
Wayne Monteath
Masham, Quebec.