If you have only 9.5 volts cranking you have a problem.Either the battery is weak or too small.Or cables too small or poor grounds.That or starter is drawing too much.You should have at least 10.6 cranking.Dont blame MSD for another problem.My 440 with 12.5 compression usually stays at 11.5 volts or so cranking.Rocky


Chrysler Firepower