Roger that Racer4. I had "gauge" on the brain when I wrote that post. Autometer Z-series.

I did upgrade to copper tubing, but the six foot length ran out when I got to about the steering box, so I finished the line with the nylon that came with the meter until my other copper tubing order arrives. Braided steel would be the ultimate, but I think I'll be fine with the copper, especially since its protected from flying debris by the skid plates.

BTW, I found Autometer sells a M14x1.5 to 1/8 NPT adapter so I can connect the oil temp sensor where the oil pan drain plug goes. No on truck welding!