MSD coil installation

Just ordered an MSD 8222 coil. I'm a bit confused, do i need to keep the Ballast resistor or not? I will using that coil on my 1972 stock electronic ignition.

From MSD installation instruction:

This Blaster Coil Kit is intended to be used with an MSD Ignition. If installing on a stock, points style ignition system, a 0.8 ohm ballast resistor or resistor wiring MUST be installed


Primary resistance:
.7 OHMs

Secondary resistance:
4.5K OHMs


As it's a 45000v coil, do i need to widen the spark plug gap?