I'm lucky in that a guage restoration shop is only 25 miles from my house and I've had D&M Restorations doing some work on and off for over 15 years.
So, I had him recalulate my oil pressure guage to where the actual pressure is double what the guage shows. So when it reads 15 its really 30 or reads 30 its really 60.
At the time I also had him check all the others and rework the speedometer so all guages are original...
BUT unless you want originals here is another option. I have forgotten the actual year but I believe there is several years where a 280Z guages will work. The different year of guages just have different color face/marks.
Here is a picture of one I got AFTER I found this out. The 37 guage bezel will fit over the "Z" guage and fit in like the original. The bezel goes on the Z guage tight so there is no worry.
http://i140.photobucket.com/albums/r19/LutherParris/52Panel/picsforphotobucket005.jpgI have also "heard" that the Z speedometer will work to with very little work but I don't know what that is.
