OER IN12450G Features:

New OEM factory dash tach mounts in the dash like original now available! This dash tach is made out of metal, and looks exactly like the original that offered in 1964. Unlike the plastic and incorrect prior produced ones. This is 100% correct for you 1964 GTO, LeMans, and Tempest. This tach takes place of the clock. This tach will work with factory GM points or factory HEI. It may need a tach adapter when using this on MSD or after market ignition. Tachometers will work with factory GM points or factory HEI ignition. When using an aftermarket ignition system likes MSD, Accel, Patronix, ect. A lot of these systems generates higher output voltage to the tach lead than what a factory GM tach can handle. Factory GM tachs can operate on voltage ranging from 11.2 to 14.7 Most aftermarket ignition systems generate over 18 volts. You will need to buy from the manufacture of your ignition system an adapter to lower the voltage to the GM factory voltage. Additional Information Note New OEM factory dash tach mounts in the dash like original New OEM factory dash tach mounts in the dash like original