Coil Confusion

I recently installed a complete MSD ignition system. In the coil instructions it says to always mount the coil vertically. On a 340/LA motor you can accomplish this by using a bracket Mancini makes specifically for this purpose.

The coil must be matched to the ignition system. In my case I bought the whole MSD package: distributor, coil, and box. The system I have eliminates the ballast resistor. So far so good.