Well, all it took was calibrating.
I used the "W" wire to the yellow and the violet to ground.
All I had to do was turn the red dial one click and I was in the ballpark.
Worked with the green and red till I was withing about 20 rpms of what my photo-tach was telling me.
Sped it up to 1850 and the photo tach read about 1820 or so which is as good as I think I can hope for.
I guess that I am just so used to plug and play that I figured it should have at least been close from the get go.
Thanks for the help.
Never did find out what the "G-" wire was for. I just zip tied it to the harness for future perplexation.

P