injector size? (Not, "I have a red"..)

[Barnav1t]

Hey guys, looking for a little help on my injector setup. I believe I have 270cc injectors now (looked up color/part number to come up with that) and will need new ones when I get my ECU done. My questions are these: What size should I go for, and do I need to get the high flow pump before I do?

I am going for the RS-Enthalpy ECU. I chose this one after lots of research and deciding I don't yet need a stand-alone. I was thinking of injectors in the 350-450cc range. A list of mods follows, and I plan on installing a NOS 100hp fogger in the not so distant future, just something to keep in mind.

Mods: Cold air induction, 4-2-1 header, 2.5 in exhaust, 264/264 crower cams, adj. cam gears, titanium .5 mil oversized valves-springs-retainers, 15% underdrive pulley, A/C delete.

It probably has no bearing on injector choice, but I also have: 4 row aluminum radiator, 8 lb flywheel w/ stage 3 clutch and new OEM bore/stroke pistons. Just figured that may help with any questions as to the durabilty of the engine.

I fugure 350cc would be sufficient, but 450 may be needed when using nitrous... I just don't want to run super rich all the time. I would appreciate any input I can get. Thanks!