I have a 98 with the 28# injectors, but I assume I need to go bigger. I am making about 375 rwhp right now and will be spraying a dry 125 shot. I am adding a Walbro 340 fuel pump, and I'm wondering how big should I go on the injectors? There is a possibility I would add long tubes down the road also.

 

The 28lbers can support a bit of power, though you'll need to upgrade anyway since your running a dry kit. I'd go with some 36lb injectors, they're big enough to give you leeway if you want to up the shot.