http://www.langdonsstovebolt.com/store/#!/NEW-OEM-quality-Thermostat-housing-w-outlet-on-both-sides-for-216-235-261-&-GMC-Alum-With-Gasket/p/62857064/category=18665950
This is one solution for adding a sensor or relocating the sensor for the gauge. Given, the ECM will give a temp readout on the hand held programmer and has the ability to control an electric fan.