This Switch will supply then remove ground to a circuit. 1970-american-motors-ambassador-esi2228326 600 in Rounded Rectangle Port

600 in Rounded Rectangle Port - Steel Core Graphite - Small Block Chevy - Pair

600 in Valves - 223 cc Intake - 70 cc Chamber - Angle Plug - Aluminum - Small Block Chevy - Each

Bolt - 3/8-16 in Thread - 1 in Long - 3/8 in Hex Head - Stainless - Polished - Universal - Set of 5

875 in Center to Center - Plastic - Clear - Bell Helmets - Set of 30

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

This Switch will supply then remove ground to a circuit. 1970-american-motors-ambassador-esi2228326 600 in Rounded Rectangle PortThese 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