HEI vs. Mopar Box

I use the Mopar gold box on my drag car and it works great. The multiple spark only works at slower engine speeds that why I don't use one for racing. But the multiple spark works great for a dual purpose car because of the amount of time a street/strip car spends idling, and slow cruise speeds, etc. I tested a buddies MSD setup on my drag car and had no difference in performance, car ran identical numbers. So depending on what your purpose is of your car the Mopar setup is just as good as the MSD setup.