In tank fuel pump
Someone sells a kit but you need to do surgery to pull it off. A big notch gets cut into the tank and their kit gets welded in.
Here is a link to another one that goes in the stock location. I don't know if it is a kit though. It kinda looks like someone home brewed it.
http://www.forabodiesonly.com/mopar/showthread.php?t=48163