I've messed around with three different speedometers trying to get a complete unit that works. Last time I bought a new speedo head and installed, but I'm going to have to swap out the gear in the transmission to get it to read right. I can't seem to get a working temperature or volt gauge, either. That was my main reason for considering the tach force. I'm not really interested in the tach part of it, but having an entire gauge cluster that works and looks somewhat original would be great!