It's easier to tune a little bigger vs trying to detune hundreds of hp esp if the supporting mods don't match up to say 200% over. Be pointless to go that big unless you already have a built motor for that much power. Balanced crank, billet rods, fire ring head/block. That's size injector is capable of well over 1,200hp and wouldn't be street friendly with out lots of time,work, and $$$$$. So the 100% overs is more fiesable for the goal you want and mods you have now. Least the truck will be usuable with this setup instead of trying to make that big of injector drivable on your truck much less fun to drive and tow with.