Are there any other threaded ports in the coolant system that could be used? As a last resort for that sensor you could tee into the heater supply hose but it would not be as accurate as sensing at the engine.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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