[Gdub310]

The manufacturers of most (all?) of these systems generally recommend against using the stock fuel lines, and you're going to need a return line. By the time you run new lines, swap in two new tanks, and get it all working together, it's a major undertaking.

To keep things simpler, you might want to consider eliminating one of your tanks, replacing the other tank with a new aftermarket unit, running new supply and return lines to it, and installing something like the Aeromotive Stealth 340 in-tank pump conversion (Holley also makes a similar product). While you'd give up the extra fuel capacity of the second tank, you should see improved fuel economy which would help offset the loss of range.