This is where my son mounted his tach in his 72 Dart. He can still see all his stock gauges ok. Myself I would go with black seatbelts in your car. Ron
Looking at the pictures of my dash, there might be some room for a very tiny one on the right side of the column, right next to what I believe is the wiper knob. Thinking about it again, above the dash would probably be a little distracting in an autocross or road race condition. I guess if I get a small tachometer and play around with the position I can see which I like best. My rev limiter will probably be set to about 6500 or so.
Maybe a shift light on the dash or the steering column (
https://www.summitracing.com/parts/sum-g2945/overview/) and a small gauge in that small area (
https://www.summitracing.com/parts/atm-2698/overview/ or
https://www.summitracing.com/parts/atm-2892/overview/)?
