2 ballast resistors?

The MSB Blaster coil (which I presume you have) is designed to work with their ballast. Not sure what you have a for a ballast now; a lot of aftermarket ones put on cars haphazardly are wrong for the Mopar system. So I would install the new MSD ballast.

Not sure why it will not fit though; is it the MSD 8214? They both use 1 mounting hole, right? Perhaps thread in a large self-tapping screw?