Just use two different sets of plugs. One gapped at .045 on motor then when you decide you want to use the nitrous you have your other plugs gapped at .035". I run an NGK or a Denso plug now gapped at .034". I also have an MSD 7AL3 box and other timers that take out timing when the nitrous comes in. But run those plugs like i suggested and you'll be fine.
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