Thinking about switching up my fuel system - in-factory-tank pump?

[joeydurango]

I've been running my '72 4x4 with a 5.3 for about 6000 miles now. I love it. One thing I don't love is the external Walbro pump. I'm running the stock in-cab tank (no problems there) with a gravity feed out the bottom to the Walbro 255 mounted on the frame rail. Pretty standard. However, the pump is annoyingly loud (can even hear it over the Magnaflows at 25mph in town) and when I'm driving through, say, Moab in July, it positively screams. I can't help but think the pump will die on me sometime at the worst possible moment.

So I'm thinking about going to an in-tank pump. I have no issue with the in-cab tank and don't want to relocate. Has anyone here successfully run an in-tank high-pressure pump in a modified factory tank? How about some sort of sump/baffle system to allow running the tank below 1/4? And if someone's done this, is a behind-the-seat in-tank pump really quieter and more reliable than an external pump?

I swear I've seen at least one version of this, but I can't turn it up on the search. I must be using the wrong keywords. Or, I dreamed it!