Gravity feed stock gas tank

[JMD]

My current EFI setup is using an inline fuel pump to draw from the stock pickup tube. It works okay, but once in awhile the pump loses prime and I know I’m going to burn the pump up if I don’t do something about it.
Rather than spend a ton of money on a fuel cell, I’d like to add an AN6 bung to the bottom of the stock tank. What’s the best way to go about this? Do I need to add a sump? Is there a spot on the tank that is ideal for adding a bung?