OER Parts offers a wide selection of Ignition System Components for your 1973 Plymouth Road Runner. OER Parts offers 1973 Plymouth Road Runner Performance Ignition, 1973 Plymouth Road Runner Stock Ignition, 1973 Plymouth Road Runner Coils, 1973 Plymouth Road Runner Cap and Rotors,, 1973 Plymouth Road Runner Ignition Control Modules, 1973 Plymouth Road Runner Spark Plugs, 1973 Plymouth Road Runner Spark Plug Wires, 1973 Plymouth Road Runner Distributors, and 1973 Plymouth Road Runner Tune Up Kits.