You can purchase a hand held(video cam style) short or long wave infrared camera for about 20K-25K from a number of companies such as FLIR or Raytheon. They produce color as well. Just remember, infrared energy is only transmitted from a surface, so it's not much good for air flow, though you can see the result of air flow temp. on a surface, but that requires experience & expertise in thermal imaging. Surface emissivity(ability of a material to emmit infrared energy) can vary greatly, causing misleading readings. A simple thermalcouple & inexpensive digital readout/voltmeter will give a much better picture of actual air temp at a given location at a specific time. Typical air inlet(air box) reading here in Arizona on a 100 deg. day at 60 mph varies between 105-120 deg. depending on the model of vehicle. It can reach 160-180 after a 15 minute idle & spike several degrees higher during a soak(eng. off). Here at the GM Desert Proving Ground we are constantly trying to find ways to lower inlet temps & still pass all the mandatory tests, such as dust & water intrusion. I have no personal experience with the GTO because the Aussies come over & perform all their own thermal developement. Hope this helps.