Not trying to talk you out of your idea with the coils, but running Normal COP coils with an inductive type system in waste spark is not the best idea. These coils are designed to fire once per engine cycle and in waste spark, your firing them twice per cycle. Typically, Inductive type COP coils due to thier smaller transformer size requiers a longer dwell time and running in waste spark tends to shorten dwell times due to twice per cycle firing... Also firing twice per cycle cause them to run hotter due to the twice per cycle charging..
If COP and waste spark is wanted, you are far better off doing this with CDI.. In a CDI setup. there is not real dwell time and thus allows the coil to actually run cooler. This all because your not trying to charge the coil with 12 volts over a period of time, you are spiking the coil with around 300 to 500 volts (depending on manufacture) right before the coil has to fire... Have a lack of need to charge over time, the coil does not produce the heat normally involved with inductive type setups..