99_hugger_Z

I have a 99 z28 and I have already put on a K&N FIPKII intake, a Magnaflow exhaust and a ported TB. I currently have it tuned for these mods. I am looking to put on some pacesetter headers this winter. Is it possible to put in new injectors for this setup, or would it be a waste time? I would like to put in some higher injectors but I don't know how high i could go. I know I would need tuning for the new injectors. What size do you think would be reasonalbe for my set up with headers?