Just installed an Auber pyrometer. I have a ScanGauge II, which I monitor carefully, because as 6.0 L owners know, you really have to know what's happening to your oil/coolant temperatures over time. I also wanted to know what my exhaust temperatures were reaching when going up long, steep grades with my heavy unit (there is no factory sensor for this). The RV is always working this engine, so heat is particularly important.
Found a sweet spot in my dash (where a rear A/C switch would be in a regular van, but not a cut-away RV chassis), and reemed it out with a slender burr in my rotary tool (there was a 4 wire receptacle behind the blanked out space, which Ford didn't bother to remove). Its useful to remove the radio which allows you to get your hands behind the dash without actually having to remove the dash panel. I used a key-on, fused 12V hot wire that I found near the emergency brake pedal for power. Ran the sensor cable through a rubber plug in the firewall that was very close to the edge of the doghouse, and chose a low point in the exhaust manifold (driver's side) just after the last cylinder discharge. Drilled the manifold while vacuuming the debris, and cleaned up remaining bits with a mechanics magnet through the 11/32 hole (you don't want crap going into the turbo). Tapped the manifold with a 1/8 NPT and used lots of cutting wax for lube and to catch metal.
Today was the first test, and did some good speed up a steep grade. The sensor seems very responsive and got as high as 1115 F. (the unit stores the max reading, in case you don't happen to notice it). Anything over 1300 and it would probably be time to pull over and cool off.