Originally Posted by phunk

The thermostat spacer is clever but it’s not standard to measure coolant temps after the rad instead of before it. The stock sensors are on the water outlet housing on the rear of the engine. The thermostat area will give you water temps after the rad already cooled, or water inlet temp.

Seems like the easiest place to put the sensor would be the water housing at the front of the engine on the timing cover. Unless you wanted to be super clean and remove the rear water housing from the heads to weld a bung on.

Pretty soon I have to make a billet front water housing anyway (one that clears our front throttle intake manifold), so I’ll keep this thread in mind when starting that project.