This is a NOS vacuum advance unit for the distributor for the years and makes listed below. This is for single point distributors. This is a original NOS Mopar part in it’s original packaging.
340 cubic inch engines with single point distributor
Dart Swinger 340; Demon 340; Challenger; Charger Super Bee; Charger; Charger SE
Duster 340; Road Runner, Cuda 340