The Selectors plug into the retard module receptacle of any MSD Timing Controls. 1964-chevrolet-biscayne-esi2503226 Water Pump - Mechanical -

Water Pump - Mechanical - Crank Driven - Aluminum - Clear Anodized / Natural - Midget / Sprint Car - Each

188 in Thick - 1-Piece - Steel Core Rubber - Small Block Ford - Set of 5

Header Mount - Wall Mount - Aluminum - Black Powder Coat - Kit

Nut - 7/16-14 in Thread - Hex Head - Steel - Zinc Oxide - Set of 50

Note: This system eliminates the Factory Exhaust Valves and provides "Dummy" valve stands so the Factory Acutators still work without throwing off a code

The Selectors plug into the retard module receptacle of any MSD Timing Controls. 1964-chevrolet-biscayne-esi2503226 Water Pump - Mechanical -The Retard Module Selectors allow you to select between 12 retard amounts with the turn of a dial.