Analog is the only way to go. I had a digital dash equipped Impala for a short time. Among the many things that bugged the crap out of me about that bucket of bolts was the digital dash. My head can't compute numbers relative speed with out a lot of thought. Nothing beats the swing of a needle to be able to read what the gage is telling one, particularly when there is a yellow than red zone on the gage face. That GM POS is long gone...
1967 Dart below:
My car had a small cheep non functioning tachometer clamped to the steering column when I purchased her that I removed to access the gage cluster last spring. I reinstalled the tachometer last month in the same spot using a radiator clamp & dense black foam gasket material left over from the heater box rebuild as padding:
