I plan on going this route myself so I ordered my TTI headers with O2 bungs on the collectors and EGT bungs (one per side on the typically hottest cylinder). I want better tuning information in addition to being able to better tell when something is off...hopefully before I damage something! Here's a good link to read http://www.fuelsaver-mpg.com/wide-band-oxygen-sensors If the sensor is analog and has a switch inline you might not get a very good reading. Oxygen sensors are very sensitive to wiring issues. Every connection should be soldered, and have a common ground. If the gauge has a digital input (serial-based input like the MTXL gauge mentioned above), you can install a switch without issues. The other option is to get a gauge that can read the different data streams from the serial bus and you don't need a manual switch. The LC-1 sensors from the same site above can be linked on the same serial bus, or you could add other sensors to the bus and log them all with a laptop. Cheers, Stacy -- -- Please address private mail -- mail of interest to only one person -- directly to that person. That is, send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en.