MSD has a couple of different ways to advance, and retard timing electronicly. They use to call one a "Ping Control". The other is a timing retard box used when using nitrous, it has 3 stages of retard plus a wire that goes to the starter that retards timing 20* while starter is ingagued. The "Ping Control" has a knob on the dash to adjust the timing.
Just a thought, Larry