All you need to do is use the wire/wires (ign1 and ign2) that would normally go to the ballast resistor and go direct to your coil and module.
Normally these two wires can be connected together and run one wire from them to your coil and/or module.
Below is the four pin old style module diagram and the 8 pin module diagram in case you don't have them.
A tach would connect to the coil ground on either system.
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