I have a 6.7 pump on mine. Had it for about 4-5 months now and have had no problems. Hold's pressure extremely well with my 205/100's too. I plan on getting rid of the fuel bowl and adding a finer micron filter after the pump, run it to a Y, then to the heads while I have the engine out.
another option is a rr, oem hfcm paired with a 6.4 hfcm as a lift pump, then a sump.... i have this setup and holds 205/75's. very happy with it and reliable. the 6.4 pump is the same wiring harness as the 6.0 pump- just tie into the factory wiring and your done.