Posted by Support Staff on 22nd Sep 2021
1967-72 Chevy and GMC Tachometer switching to HEI ignition or similar after market ignition from a point type ignition systems
The original tachometer and most aftermarket tachometers do not work with HEI ignition systems. Aftermarket replacement tachometers usually say "WILL **NOT** WORK W/ HEI DISTRIBUTORS" on their product
…