6.7 pumps. Running them on my 5.9 motor. A 10mm pump can easily fuel you to 800-900hp. All depends on the size of your injectors and your turbo application.
6.7 Stock pumps only require you to slightly bent the hard line to the CP3 to fit(Idid it be hand, real easy). I have a stock one on my 5.9 and did the swap in my driveway. I can't see a modded pump being any different but I could be wrong.