Got my new speedo and tach all installed, and working... Here's a little before and after action:
Broken Speedo, and soon to be broken tach:
New speedo and tach, each placed in a location that better suits my eyes while driving:
The only gripe I have about this Bosch retro tach is that the back-lighting is green, while the rest of my gauges are white, but that's pretty minor. I think it's a green LED, so if it starts to bug me too much, I guess I'll just take it apart again, and solder in a white LED...but probably not.