I was told that those "hot" MSD coils are a good plan (in conjunction with the MSD unit). They provide 40k volts and will do so throughout the rev range. I'm told the Bosch coils will not do this. This allows one to gap the plugs at .05 which, supposedly, gives a larger spark for better flame propagation....just requrgitating the advice I was given for my carbed engine, here.
In actual practice, it works GREAT !!
I used the high vibration thingy.
I can now drive the car around at 2500 rpm (or less) without fouling plugs.....not that it's any fun
It will also sit and idle at 1K without fouling. Starting it after sitting for a couple weeks is a bit of a trial but it's mo better. If started daily, it lights right off.