Correct Ballast resistor

Which is more correct and which one should I get ??

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How about NONE of the above, upgrade to an Ignition System that doesn't run on 5-6V through a ballast resistor and ignition from the 1960's, join us here in this century.

The HRR688 will upgrade it and you'll never have carry a spare ignition part again.

The Only Ignition components with a 5 YEAR WARRANTY, Distributors and ECU's