A little update:

I recently learned that my MSD ignition box may have an impedance conflict with my Pertronix coil, which could lead to the coil failing. Confirming this with the MSD tech, I purchased a new MSD matching coil. After changing the coil, I noticed my old coil was already showing signs of failure!

Thanks to a friends heads up I avoided the roadside dance! Thought others might appreciate this.