I built my cell so I had control of all factors...My sump is like and upside down pyramid with a 4x4 flat bottom that holds 'bout 1.5 gallons.It is partitioned off from the cell above by a funnel shaped "top" with a 1.5" hole in the center.....like a funnel...duh.
I took a 2" piece of 3/8 ID aluminum tubing...tigged it to the inside of a -8 male weld in bung then tigged the bung on to the outside of the cell(@ the Bottom) I made sure the pickup tube was deadcenter at the bottom of the floor of the sump.I held it up bout .25" off the bottom so as not to pick up any debris that may fall into the tank.Works like a champ,have NEVER starved for fuel even long periods on my side.I loose oil pressure WAY before fuel pickup would be an issue.If you see my out wheelin stop and I'll show you:beer:
Edit for clarity: The bottom line is................the pickup is at the lowest point of the cell,in the middle/bottom of a captive pool of gas.The extension tube on the bung allows for the pickup to be centered WITHOUT the bung being welded to the bottom of the sump,pointing down and being at risk of being smashed.I guess youd just have to see it.