SSV8

Hey guys wondering which fuel pump I should go with. My power goals for now are 550 whp with a huron turbo kit. and I have read that the walbro 255 can handle that amount of power. I do not want to change anything else with fuel system besides the injectors which will be changed to deka 80s. I was reading that with the 340 I might have issues with fuel pressure, is that correct? I do not want to add a return line yet or an fpr. Will I be able to use the 340 without any other add ons? Thanks!