Just a quick update. I installed my DD gauges on my '80 Z28 and found that while the color of the wires my be different from year to year the location of the pins remains the same. Due to my setup I did not have to use pins 2 and 12 as the DD gauges come with their own senders. In addition, and for some reason that I have yet to figure out, my Tach is not working. I disconnected the #1 wire and intend to run a wire directly from my distributor to the DD box to see what happens. Otherwise everything worked great. Very easy install.