GM HEI/Ford TFI Ignition Equipped Vehicles

For vehicles equipped with the conventional GM HEI distributor (with vacuum advance), large cap HEI with vacuum advance or a Ford TFI Ignition, the PN 8682 djustable Timing Control is the correct model. Special terminals are supplied, which permit this unit to be connected directly to the existing distributor wires. This simple and clean installation will require less than twenty minutes to perform! The Adjustable Timing Control’s dash-mounted control knob gives the driver full control over the ignition timing. The knob allows up to 15° of adjustment and can improve mileage and performance while preventing detonation.