I have a '70 with a 455. When I bought it, I was told it had the wrong temp sensor (it has idiot lights), it has the single terminal. I first tried to get an idiot light temp switch at Autozone, but all they showed was a gauge sending unit. I had them check earlier years and I think 68 or '69 listed an idiot light temp switch and it had 2 terminals. Since then, I believe I have figured out that the block is from a '74 or '75 Trans Am, with '67 428 heads on it. Not 100% certain. Anyhow, I left the gauge sending unit in it as I bought rally gauges, so I didn't check on the temp sensor situation with the '74/'75 455.