The best palce to tap into for your light source is behind the actual switch on the dash that turns your lights on, i believe it is a purple wire just use a test light and probe the conector, if you get the right one it will also work with the dimming feature. As for the best match for gauges i like the isspro gauges i have done 2 sets so far one in my truck and one on my fathers and they are a very close match. As for the backlighting all 2008 superduty's light up the same green as i have a harley davidson my father has a lariat and my uncle has a king ranch. Hope that helps
