Going back to Chrysler ignition

I think the OP meant a 3 ohm coil instead of 300. Some folks think that is a good idea since the DC resistance seems to add up and now all the power is going into the coil. The answer is ……it depends……

Keep in mind that the ballast resistor resistance is relatively fixed during ignition operation and the coil changes resistance based on current and frequency. This can be a significant change. So unless you are smart enough to figure this out (not me) and have the test equipment to validate it, changing things is a crapshoot.