Hi,
You can try the green wire from the tach, hook it to the MSD port. Don't know if SW needs an adaptor.You'll need power and ground wires to the tach,plus dash light.
The alt wiring depends if you have a modern integrated alt with voltage reg inside the alt. It's more complicated if you have a separate voltage regulator. After you figure out which type you have ,look in a Haynes Manual for a wiring diagram.
Perry.
