I heard they hold up better than the Carter's, my carter only lasted about 9 months on my old cummins, check DieselRam.org under the 24 valve section, those guys know their ish on Cummins lift pumps, I heard the Walbro's are more reliable though
If you got a little more money you can get a airdog and be done with it they are just like the fass setups but on sale right now for 499 and come with everything to run and 6 year warranty.