I'd run them. I used their gauge overlay on my 89 5.0 and it was nice. Plus all their gauges are very customizable. I helped my friend's wife pick him out some boost and fuel gauges for his GTO and he was very pleased with them.
I installed a set a few months ago and I like them. I will try to post some pics when I get back from my trip next week. I like that you can customize them. I did black background with white numbers and red through gauge back lights. The 270* sweep is pretty cool although it feels like you burn through gas faster since the needle has a longer sweep.
My only minor (very minor) complaint is that when it is real quiet you can hear the servo's clicking inside the gauges but it is hardly an issue because when is you car ever quiet?
Overall- a big thumbs up for price and customizability.
I just installed them in my car my car last spring, and love them. They use a wiring harness/loom to wire the gauges together, made for a very clean install. And the quality is very good. I even got the GPS option on my speedometer so their was no cable worry about or speedo gear. I think Its pretty cool how you can customize the gauges.
Here some pics of my set up
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