[
Bill Ford: 3 wire ECT sensor PN 12551708 and connector PN 12102748.
[/quote]

John Spear tells me that I should use the sender that comes with the Gauge Set I choose in order to get the resistance values correct for the gauge. So I think the adapter route in the passenger side head would be the best way to go.

However the 3 wire ECT Sensor would be the easiest way. Does anybody know what the output of the 3 wire sensor is? Perhaps the output is the same for all gauges?