I ordered a new temp gauge from this site to replace the broken one on my B while I had the cooling system torn down. The new part won't fit. It is supposed to fit all tractors of that era. But the sensing element is about 3/4 of an inch longer than the old part, and the threads won't reach the top of the thermostat housing. Any idea where I can get the right part? I assume I can't cut the sensor shorter without ruining it?