In-dash tachometers

Look at the tach in the Dash. You put the needle on at its location to zero with power on after you replace the face with a 67-69 sticker.. The needle only knows where zero is when you put it there. I did several including one for my Demon. Its 1 RPM off every 10 due the aftermarket tach being 8000. You don't notice it . You just have to remember if your at 6000 your around 6600. Who cares anyway with that little tach your still shifting it by ear.