[StingRay]

I have done the use one light for both in a gauge dash. I used the wires from the non gauge dash harness and they clip right into the gauge harness. I then used the idiot light senders for the non gauge dash wired to the one idiot light wire. The senders just ground out to activate the light. I used a tee at the oil pressure port and used the sender hole in the other head for temp. I use it like a check engine light. If that light were to come on I'd be checking the gauges really fast.