Okay, I'm going to add to the original topic of failing lift pumps. I have a 1986 F350 with a 7.3idi (originally came with the 6.9) and had the mechanical lift pump fail at 2300 miles. This engine is fresh from Jasper yet I'm certain the lift pump was a Chinese import. Despite the fact that it's still under warranty, I had no intention of having another mechanical lift pump installed when this one crapped the bed so soon out of the gate. I installed a duralift facet pump after reading many pros and cons about electric facet pumps. What I came away with is that the majority of reviews I read or you tube videos I saw, the failures involved people who either used cheap pumps from their local auto parts store, or installed the facet pump in the engine compartment. At the risk of getting my man card pulled, I read the manufacturers instructions which clearly stated that the pumps are designed to push, not pull. Despite the fact that it says it's good for 10' of lift, my front tank is further than that from the engine compartment, even further for the rear tank. I mounted it on the frame rail just north of the fuel tank selector valve. I only have about 1k miles on it since this modification but so far it's running smooth and I'm getting 16mpg city driving. I haven't felt the need to install a pressure regulator yet, but it's an option.
Long winded, I know.