Your math is correct. They most likely were pushing the injectors harder, meaning a higher duty cycle. Assuming your injectors are 24lb injectors. YOu can safely push injectors to 85 and 90% if necessary. Just depends on what you need, what's available, and what your fuel pressure is.
According to this link
https://www.injectorrx.com/bosch-fuel-injectors/ They are 25lb/hr injectors.
They'll work just fine for you. You can always increase the fuel pressure, too. I recommend a dyno tune or at least a dyno session with O2 reading once you get the car together. You may find power but you'll determine if the engine is safe more importantly