Having the right turbo to help clean up the fuel is essential and aids with not having to pull as much fuel. If you can clean that fuel up you'll be golden. As for the /30 vs /75 nozzle, I think you could have fuel pulled and have your tuner work you a pretty good tow file and I'd recommend Matt at Gearhead for that. tow tuning also works the transmission data and he's great at it. I say go with the 75's and be done with it. I'm assuming you're upgrading turbos because 190's on a stock turbo is pushing the envelope a bit...hahaha It's doable but not optimal.