This conversion harness is used to add console gauges to a car that did not originally come with gauges. It connects to the wiring harness plug on the gauges and is meant for a manual trans. I would think you could also use it with an A/T by just leaving your neutral safety switch wiring in place? It has wiring diagrams and very clear instructions with it. It came from Classic Industries and cost $139.99 plus the shipping and tax. Thanks for looking. You can contact me at [email protected]