[Mustang_GT_90]

Man you can run low 13s with the stock 19#s easilly, with what's listed in your signature I'd just pick up a set of used 19#s somewhere. Somebody will have to correct me on this but I think 19# injectors are good well into the 300 horsepower range, seems like I've heard 350 or 330. The thing is you like don't want to size injectors to big because it's gonna hurt you more than help you.

If you're wanting to use a nitrous kit and asking about the injectors then I'm assuming you're gonna be running the NOS Dry Kit. How big of a shot? You'll be fine, the injectors are going to run at 100% duty cycle when being sprayed and the fuel pressure increases but you'll be fine. I've heard about it wearing injectors out but that's gonna happen on any injector running full duty cycle.

Something you actually might want to look into though is a good aftermarket fuel pressure regulator and an aftermarket fuel pump. Fuel pumps are cheap and regulators are too. That factory pump can hang easilly with the injectors but I mean if you're gonna be spraying it you might as well go ahead, it's cheap insuraance. And the regulator, you'll have to play with your fuel pressure but you can get in the ballpark setting it like everybody else. The fuel pressure regulator can really help out throttle response.