Sorry to be the doubting Thomas here, but I don't think you'll be getting 350-400hp from only 440cc injectors.
IIRC, in last months SCC mag there is a formula to calculate the possible hp based on injector size. Shiv's VishnuPerformance set-up is using 550cc injectors and they were guessing around 350hp from those injectors. With 440cc you should be getting around 280ish HP (still a lot of HP). At that level of power, I would still be concerned about the tranny though.