After daily driving an RB car for a few years now I have finally settled on which gauges are crucial for me. Voltage, Boost, Fuel, water temp. A/F would be nice but is not really needed because when I am out raising hell my laptop is logging it.
I would consider buying cyberdyne gauges, and taking them apart to relocate the digit display. I did that with my 240sx gauge and my car displays voltage where idiot lights once were. It is very commonly confused as being OEM by non 240sx owners. You could easily fit two gauges in the spot of one when it came to some of them
Evan