Cylinder head nuts????

Now, my TO-20 once had a "temperature indicator" which was the usual sensor in the front end of the cylinder head, and a long tube going back to a gauge slung under the right side of the dash on a simple bracket. All that's left is the bracket, the sensor stuck into the head with the tube cut off, and two metal clamps under the front and rear head bolt nuts on the left side of the engine. I've got a new gauge and all. What happens if I try to loosen the nuts on the two front and rear head bolts? Head cracks? Studs pop off? Or, it all just works fine, the nuts come loose, I open the two clips and hook on the sensor tube, and I mount the sensor end and gauge end of the device to get a new working gauge? What do you think?

George

Gerald J.