You can't change just the coil, I believe; you need to buy a whole Petronix or Crane ignition setup. These replace the points entirely, and changing the coil is an option in that. If your car is running fine and you're happy with it, you might be better off leaving it alone.

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k