This Switch will supply then remove ground to a circuit. 1970-american-motors-ambassador-esi2228326 Starter - Ultra-Duty - Gear

Starter - Ultra-Duty - Gear Reduction - Reverse Mount - Reverse Rotation - Asphalt Bellhousing - Each

950 in OD - 2

Valley Cover - Aluminum - Natural - 383 / 400 - Mopar B-Series - Kit

50 Male - Each

This Switch will supply then remove ground to a circuit. 1970-american-motors-ambassador-esi2228326 Starter - Ultra-Duty - GearThese RPM Activated Switches will perform a variety of different functions from turning on a bulb or solenoid to activating an MSD Timing Control at a desired rpm. The RPM Activated Switch, PN 8950, has two activation wires; one to ground a circuit and the other to open a circuit. Simply plug in an rpm module and wire the Switch to the circuit you want to activate. When the engine rpm reaches that amount, the circuit is activated and will remain on