While it may be true that multi hole injectors atomize the fuel better, it ain't going to make a difference on your stock truck. I have USCAR EV6 50lb/hr injectors in my turbo 6.0 foxbody with stock cam/valvetrain, I didn't notice a smoother idle or overall driving with just the larger injectors.
Even if they put out 26lb/hr at 4 bar pressure like you need, all of the other data won't be the same as the GM data. The offset vs volts, short pulse adder, min pulse width and flow rate data all need to match the injectors installed, no way all of that stuff would be the same.