I'll second what
@legopnuematic said. I've got Squarebody Syndicate's version of the Dakota Digitals in my '85 and they're awesome. Very nicely built, easy/simply hookups and looks OEM+. They're really the only gauges I'd ever consider paying money for.
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I have various friends that have used all the other brands and they simply don't measure up. Intellitronix is absolute junk, terrible quality and they fail constantly. Do any kind of research on them and you'll see lots of threads complaining about them. NVU (Nu Vintage) are great looking gauges, not bad quality but as Spencer said, the backside is not clean and hookup is a royal pain. It's like those old school electric gauges from the '80s that just a bundle of snakes in the back
Here's some pics from the install of my Dakotas. Their brain box can be mounted in various places and now people make brackets to hold this and the BIM modules if you have those too. My truck is LS swapped with a GM computer, so I used one of Dakota's BIM modules to pull most of my info directly from the computer, the only Dakota sensor I used was the Oil Pressure. Everything else either came through the BIM or from the OE gauge plug (turn signals, fuel level, high beam indicator, etc).
This is me testing everything prior to doing final install. You can see the gauges, the main brain box (the larger one) and the BIM module (the little box)
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I ended up just zip tying the brain box and the BIM up inside against the large sections of loom, off to the left, so they're nice and sturdy. I plan to buy one of those mounts at some point in the future to mount them better, they just didn't exist back then. I thought I had a picture of them mounted, but I don't unfortunately.
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Here's a couple different versions of those mounts I'm talking about:
Laser cut steel bracket mounts a Dakota Digital instrument system control box plus an BIM-01-2 as well!
azproperformance.com
When doing modern wiring jobs in these C10’s the real estate for mounting components gets used up quick ModernC10 devised our high quality, precision laser cut Dakota Digital control box/expansion module bracket. These brackets fit all 3 sizes of Dakota Digital expansion modules, and are...
www.modernc10.com