Here is the product, there are a few pictures. Basically the tank is divided into two sections.
http://www.proalloy.co.uk/cgi-bin/si...84&id=proalloy
Yes it's totally aftermarket/custom. The stock setup is a returnless feed from the right side of the tank, but since it's a wide tank the cars fuel starve on long turns. Which is why I thought to have two gravity feed lines, one from each side of the tank.
So it could be potentially dangerous to pull from two gravity fed lines? One from each side of the tank? I really don't want to switch to the stock setup, but maybe I should just do that and plug the two AN bungs on the left side of the tank.