Craig@lecktrix.com writes: Im putting a 63 Spyder dash cluster in my car. Do I have to buy one of the expensive buggers, or has anyone had any luck cross refrencing a cheaper sender?? Craig, In a word, no. We discussed this topic a few months ago and had no luck finding a usable thermistor that will screw into the head. Ed Corson (CORSA member) IECC - Riverside, CA