After having injector issues on my other truck I have become a believer of everything but injectors first. You would be surprised what you can do with EFI and stocks sticks, you can drain the rail pretty good. A real pump can help you go along way even with stock sticks. Then when your injectors give you an issue, buy new genuine injectors (larger flow of course) and new connector/crossover tubes then replace them. That's the route I'm going this time, not saying I'm right just my opinion.