Also, on a 71, the gauges are almost impossible to get to with the dash installed, so if anything needs done to them, do it now. I would buy one of the electronic voltage limiters from Real Time co, and replace the old one, cause if it goes bad it can stick either open, or closed, if it sticks open that will fry the gauges. On the harness, buy one from Year One cause they are the best. If you need any more help, just holler.