If you are putting that much $$$ into it why wouldn't you do a a low side aux pump should be the question. IMO skip the voltage booster - those seem to be used more for the e-85 upgrade. But ... I guess if you drive around at under 5000 rpm all the time you'll be ok. What does your builder say? That will determine what pully you can use safely. But I would rather future build on the side of caution - yes to aux fuel pump - then also you are ready to go with phase 2 also
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