Chrysler 392 Hemi Pro-Billet Distributor Precision Timing And Control For Your Vintage 392 Hemi. Must Be Used With An 6, 7 Or 8-Series MSD IgnitionFor tuning, the HEMI distributor features MSD's easy to adjust mechanical advance and is supplied with different springs and stop bushings. This allows you to custom tailor a timing curve to match your application. There is also a vacuum advance canister that will help with economy during cruises and throttle transitions. The distributor is supplied with MSD's heavy duty race rotor, distributor cap and spark plug wire retainer. An MSD Ignition Control