Bruce My 71 440-6 Challenger tach is the same as yours. After reading Pauls post and agreeing some early 72's used 8 grand tachs, I wonder if the 5500 redline 8G tach could in fact be from a 72 and not 70-71. Since the 7 grand 72-74 tach has a redline of 5500, perhaps the same redline was used on the leftover 8G tach installed in rallye clusters in 1972 lower compression 340 E bodies. Also agree with Barnabas
