This Switch will supply then remove ground to a circuit. 1970-american-motors-ambassador-esi2228326 Bolt - 3/8-16 in Thread

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

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

750 in Long - 3/8 in Diameter - 0

Quick Change Gear Set - 8500 Series - Set 13 - 10 Spline - 4

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

This Switch will supply then remove ground to a circuit. 1970-american-motors-ambassador-esi2228326 Bolt - 3/8-16 in ThreadThese 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