Unless I am mistaken, you can get a tach signal from the coil. I used this to get a tach signal to trigger the MSD RPM switch on my previous SVT intake swap.
The Sunpro must have three wires-12v, ground and signal (this one is probably green).
Look at the connector at the coil-it will have three wires (you may have to unwrap some of the tape). One wire should be green w/black. This is the signal. Splice into this wire for the tach signal, then run the wire into the interior. The power/ground should be easy-just make sure it's live on start/run.