Here's a pic of my rig. The plastic piece goes between the Tach and the console so you can adjust the angle. I still need to look for a wiring diagram to see how it all goes. Like I said, My car did not have this factory tach. Got it from one of my swap meet buddies at Carlisle. Looks darn near NOS to me. Also, I'm not sure if my console plate has the knock out for the tach. I'm gonna pull the dash and the console next week, so I'll see.
id love a console tach. You say this is not the or piece but it looks darn good. Des your contact have more.
