Picked this up on line for $105 delivered a few weeks ago. I tried out "Stang Mods" vs. American Muscle. Took longer to get the product, but shipping was free to Canada, which is rare.
Just installed and tested before the weather turn worst and I garage the car for the winter.
Overall, it was easy to install right above the steering column in the instrument cluster. Ran the wire down back and to the clutch side where the main wiring exits through the fire wall. Connected green and red to the coil (green and red), black to a ground source and it worked perfectly.
Settings are easy enough with small dials to select 1000's RPM and another for 100's. Did my road test and it is bright as hell at night. So day time, I have no doubt it will be highly visible.
So if you are looking for an inexpensive shift light, this one seems to do the job.