What brand of gauges are the most trust worthy? I am going to put a quad pillar in with oil temp, water temp, egt, and fuel pressure.

 

Can't go wrong with Auto Meter.

 

Isspro are very good too.

 

Clay at Riff Raff Diese run special on guages quite often both Isspro and Autometer

 

I just tried my first glowshift (about a week now) for fuel pressure. I got the red digital model. I don't know about long term reliability but the price was right. Upon first inspection the construction seems solid but time will tell if it holds up. The remainder of my analog gauges are Autometer. Several folks run an Edge Insight monitor. Its digital gauge that uses the on board OEM sensors and reads the data through the CAN port under the dash. Install is super easy and will measure every thing you want except for fuel pressure. Enjoy!