mallory ignition system

If your car is basically a street car go with one with vacuum advance, it will help with fuel economy.

I am currently running a Mopar Performance billet distributor that my son picked up for me, it does not have vacuum advance and I lost about 2 mpg. The MP billet distributor is made by Mallory and uses the Mallory adjustable advance mechanism (reqal easy to set up) with a standard mopar type magnetic pick-up, rotor and cap.